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Bolbbalgan4
Bolbbalgan4 in March 2018 Woo Ji-yoon (former) (left) and Ahn Ji-young (right)
Background information
Also known as	BOL4 Blushing Youth
Origin	Yeongju, Gyeongsang, South Korea
Genres	K-pop folk rock Rhythm & Blues Indie pop
Years active	2016–present
Labels	Shofar Music King Records
Members	Ahn Ji-young
Past members	Woo Ji-yoon
Website	www.shofar-music.com bol4.jp

Bolbbalgan4 (Korean: 볼빨간 사춘기; RR: Bolbbalgan Sachungi), also known as BOL4 or Blushing Youth (赤頬思春期, Akahō Shishunki), is a South Korean musical act formed by Shofar Music in 2016. They appeared on Superstar K6 in 2014 before signing a contract with their current agency. BOL4 was originally a duo consisting of Ahn Ji-young and Woo Ji-yoon. They debuted with the single "Fight Day" from the mini-album Red Ickle on April 22, 2016. The first syllable of the Korean word sachungi "puberty" is pronounced the same as the Sino-Korean numeral four (sa), and accordingly the group name is sometimes shortened to BOL4.

The duo went on a temporary hiatus due to Ahn's music classes requirements in the first half of 2018. Bolbbalgan4 signed with King Records and debuted in Japan on June 5, 2019, with the mini-album Red Planet (Japan Edition).

On April 2, 2020, Shofar Music announced that Woo Ji-yoon had left the duo, and Ahn Ji-young will continue to promote as Bolbbalgan4 as a solo act.

Formation

Jiyoung and Jiyoon were both raised in Yeongju, North Gyeongsang Province, and were classmates. They had previously competed Superstar K 6 in 2014. Since they were young they had dreamed of becoming singers. The name of their duo was built on the grounds that they wanted to make the kind of pure, honest music that can only be found in adolescence. Jiyoon portrays the "blushing" part of the name because she is often shy, while Jiyoung portrays "youth" because she acts like an adolescent girl.

Members

Current

• Ahn Ji-young (안지영) – main vocals

Former

• Woo Ji-yoon (우지윤) – guitar, rapping, backing vocals

Discography

Studio albums

Extended plays

Singles

As lead artist

Collaborations

As featured artist

Soundtrack appearances

Other charted songs

Concert and tours

Headlining concerts and tours

• BOL4 1st Solo Concert "Red Planet" (2016)
• BOL4 1st Concert in Taipei (2017)
• BOL4 2nd Solo Concert "Imagine" (2017-2018)
• BOL4 3rd Solo Concert "Travel" (2018)
• 2019 BOL4 Spring Solo Concert "Flower Energy" (2019)
• 2019 BOL4 Asia Tour "Blossom" (2019)
• 2019 BOL4 Tour Concert "Two Five" (2019)
• BOL4 (赤頬思春期) Japan Live Tour 2020 "Love" (2020)
• BOL4 Concert "Seoul" (2022)
• 2023 BOL4 Concert in Taipei (2023)
• BOL4 Concert "Love.zip" (2023)
• 2023 BOL4 Asia Tour "Love.zip" (2023)
• 2024 BOL4 Concert "Bloom" (2024)
• 2025 BOL4 Asia Tour "Bloom" (2025)

BOL4 1st Solo Concert "Red Planet" (2016)

BOL4 1st Concert in Taipei (2017)

BOL4 2nd Solo Concert "Imagine" (2017-2018)

BOL4 3rd Solo Concert "Travel" (2018)

2019 BOL4 Asia Tour "Blossom"

2019 BOL4 Tour Concert "Two Five"

BOL4 (赤頬思春期) Live Tour 2020 "Love"

BOL4 Concert "Seoul" (2022)

2023 BOL4 Asia Tour "Love.zip"

Showcase

• BOL4 (赤頬思春期) 1st Live Showcase 宇宙をあげる～ (2018)

Videography

Music videos

Filmography

Television shows

Awards and nominations

Notes

1. Gaon Chart no longer releases download sales figures from January 2018 onwards.
2. In April 2018, Gaon Chart introduced music recording certifications for albums, downloads and streamings.
3. Includes the Billboard K-pop Hot 100 (discontinued since April 30, 2022), and the subsequent South Korea Songs chart (launched in May 7, 2022).
4. Hidden track from Red Planet album
5. "Travel" was certified 2× Platinum for surpassing 200 million streams in February 2023.
6. "Travel" was certified Platinum for surpassing 2.5 million downloads in April 2019.
7. "Bom" was certified platinum for 100 million streaming in June 11, 2020

References

1. ^ "BOL4 on Apple Music". iTunes. Retrieved 2018-05-29.
2. "볼빨간 사춘기', 슈스케6 출연 이후로 "영주 시장과 통화했다" (in Korean). Sisun News. 2016-09-21.
3. "'학사 경고 위기' 와 활동 전면 중단하고 '대학생'으로 돌아간 볼빨간사춘기" (in Korean). Insight. 2018-03-14.
4. "볼빨간사춘기, 6월 일본 정식 데뷔..'우주를 줄게' 日 버전 출시 [공식]" (in Korean). Daum. 2019-04-04.
5. "赤頬思春期、日本デビューALより『宇宙をあげる』MVフルバージョンが公開" (in Japanese). Dwango News. 2019-05-22. Archived from the original on 2019-05-29. Retrieved 2019-05-29.
6. ^ "韓国シティポップの大本命・赤頬思春期、「宇宙をあげる」MV公開＆先行配信スタート" (in Japanese). Billboard Japan. 2019-05-22.
7. "韓国のストリーミング女王・赤頬思春期、サマソニ出演" (in Japanese). Oricon News. 2019-05-23.
8. "[전문] 볼빨간 사춘기 측 "지윤 탈퇴→1인 체제로 5월 새앨범 발표" (공식입장)" (in Korean). Sports DongA. 2020-04-02.
9. "올드스쿨' 볼빨간 사춘기 "음원차트 역주행 신기해" 발랄 입담 '눈길" (in Korean). ENews24. 2016-09-21. Archived from the original on October 26, 2016.
10. "안지영" (in Korean). Naver.
11. "볼빨간사춘기 프로필" (in Korean). Naver.
12. "우지윤" (in Korean). Naver.
13. Gaon Album Chart:
    • "Gaon Album Chart - Week 40 (Red Planet)" (in Korean). Gaon Music Chart.
14. Cumulative sales of Red Planet:
    • "2016년 12월 Album Chart".
    • "2017년 12월 Album Chart".
15. Circle (formerly Gaon) Album Chart:
    • "Gaon Album Chart - Week 42 (Red Ickle)" (in Korean). Gaon Music Chart. Retrieved 2016-10-21.
    • "Gaon Album Chart - Week 39 (Red Diary Page.1)" (in Korean). Gaon Music Chart. Retrieved 2017-10-04.
    • "Gaon Album Chart - Week 21 (Red Diary Page.2)" (in Korean). Gaon Music Chart. Archived from the original on 2018-05-31. Retrieved 2018-05-31.
    • "Gaon Album Chart - Week 14 (Puberty Book I Bom)" (in Korean). Gaon Music Chart. Retrieved 2019-04-11.
    • "Gaon Album Chart - Week 37 (Two Five)" (in Korean). Gaon Music Chart. Retrieved 2019-09-19.
    • "Gaon Album Chart - Week 20 (Puberty Book II Pum)" (in Korean). Gaon Music Chart. Retrieved 2020-08-09.
    • "Gaon Album Chart - Week 17 (Seoul)" (in Korean). Gaon Music Chart. Retrieved 2022-04-28.
    • "Circle Album Chart – 2023 Week 16 (Love.zip)" (in Korean). Circle Chart. Retrieved 2023-04-27.
    • "Circle Album Chart – 2023 Week 50 (Merry Go Round)" (in Korean). Circle Chart. Retrieved 2023-12-21.
16. "BOL4 - Oricon Albums Chart" (in Japanese). Oricon Chart. Retrieved 2019-06-12.
17. Billboard Japan Hot Albums:
    • "Red Planet (Japan Edition)" (in Japanese). Billboard Japan. 2019-06-17.
18. Billboard World Albums:
    • "Red Diary Page.1". Billboard. 2017-10-21.
19. "2016년 10월 Album Chart".
20. Cumulative sales of Red Diary Page.1:
    • "2017년 12월 Album Chart".
    • "2018년 01월 Album Chart".
21. "2018년 06월 Album Chart".
22. "2019년 04월 Album Chart".
23. "2019년 09월 Album Chart".
24. "2020년 05월 Album Chart".
25. "Circle Album Chart – Week 16, 2023". Circle Chart (in Korean). Retrieved April 27, 2023.
26. "Circle Album Chart – December, 2023". Circle Chart (in Korean). Archived from the original on January 11, 2024. Retrieved January 15, 2024.
27. "週間 アルバムランキング (2019年06月17日付)" (in Japanese). Oricon. Archived from the original on 2019-06-16.
28. Circle (formerly Gaon) Digital Chart:
    • "Gaon Digital Chart - Week 40 (Galaxy, Hard to Love)" (in Korean). Gaon Music Chart. Retrieved 2016-10-06.
    • "Gaon Digital Chart - Week 53 (Tell Me You Love Me)" (in Korean). Gaon Music Chart. Retrieved 2017-01-06.
    • "Gaon Digital Chart - Week 40 (Some, To My Youth)" (in Korean). Gaon Music Chart. Retrieved 2017-10-13.
    • "Gaon Digital Chart - Week 22 (Travel, Wind)" (in Korean). Gaon Music Chart. Retrieved 2018-06-08.
    • "Gaon Digital Chart - Week 29 (Dejavu)" (in Korean). Gaon Music Chart. Retrieved 2018-07-27.
    • "Gaon Digital Chart – Week 14 (Mermaid)" (in Korean). Gaon Music Chart. Retrieved 2019-04-11.
    • "Gaon Digital Chart – Week 15 (Bom, Stars Over Me)" (in Korean). Gaon Music Chart. Retrieved 2019-04-18.
    • "Gaon Digital Chart - Week 38 (Workaholic)" (in Korean). Gaon Music Chart. Retrieved 2019-09-26.
    • "Gaon Digital Chart - Week 20 (Leo & Hug)" (in Korean). Gaon Music Chart. Retrieved 2020-05-21.
    • "Gaon Digital Chart - Week 33 (Atlantis Princess)" (in Korean). Gaon Music Chart. Retrieved 2020-08-19.
    • "Gaon Digital Chart - Week 44 (Butterfly Effect)" (in Korean). Gaon Music Chart. Retrieved 2021-11-04.
    • "Gaon Digital Chart - Week 45 (Space)" (in Korean). Gaon Music Chart. Retrieved 2021-11-11.
    • "Gaon Digital Chart - Week 18 (Seoul)" (in Korean). Gaon Music Chart. Retrieved 2022-05-05.
    • "Digital Chart - 2023 Week 16 (Chase Love Hard)" (in Korean). Circle Chart. Retrieved 2023-04-27.
    • "Digital Chart - 2023 Week 18 (Friend the End)" (in Korean). Circle Chart. Retrieved 2023-05-11.
    • "Digital Chart - 2023 Week 27 (Someday)" (in Korean). Circle Chart. Retrieved 2023-07-13.
    • "Digital Chart - 2023 Week 50 (Snowball)" (in Korean). Circle Chart. Retrieved 2023-12-21.
    • "Digital Chart - 2024 Week 25 (Lips)" (in Korean). Circle Chart. Retrieved 2024-06-27.
    • "Digital Chart - 2024 Week 43 (Bloom)" (in Korean). Circle Chart. Retrieved 2024-10-31.
29. Peak chart positions on Billboard's K-pop Hot 100 and South Korea Songs:
    • "Galaxy, Tell Me You Love Me". July 17, 2017. Archived from the original on February 14, 2021. Retrieved April 12, 2019.
    • "Hard to Love". July 24, 2017. Archived from the original on May 24, 2021. Retrieved April 12, 2019.
    • "Some, To My Youth". October 9, 2017. Archived from the original on January 24, 2021. Retrieved April 12, 2019.
    • "Travel". June 18, 2018. Archived from the original on June 24, 2018. Retrieved April 12, 2019.
    • "Wind". June 11, 2018. Archived from the original on September 12, 2018. Retrieved April 12, 2019.
    • "Dejavu". July 23, 2018. Archived from the original on December 30, 2020. Retrieved April 12, 2019.
    • "Bom, Stars Over Me, Mermaid". April 8, 2019. Archived from the original on May 28, 2020. Retrieved April 12, 2019.
    • "Workaholic". Billboard. September 28, 2019. Archived from the original on 2019-10-15. Retrieved 2019-10-17.
    • "Leo". Billboard. May 17, 2020.
    • "Hug". Billboard. May 23, 2020.
    • "Atlantis Princess". Billboard. August 22, 2020.
    • "Butterfly Effect". Billboard Korea (in Korean). November 9, 2021. Archived from the original on November 9, 2021. Retrieved November 9, 2021.
    • "Space". Billboard Korea (in Korean). November 16, 2021. Archived from the original on November 16, 2021. Retrieved November 16, 2021.
    • "Seoul". Billboard. April 30, 2022.
30. "BOL4 - Oricon Singles Chart" (in Japanese). Oricon Chart. Retrieved 2020-01-22.
31. "2016년 36주차 Download Chart".
32. Cumulative sales of "Let the Universe":
    • "2016년 Download Chart".
    • "2017년 Download Chart".
33. ^ C., Daniel (September 12, 2018). "Gaon's 관찰노트" [Gaon's Observation Notes] (in Korean). Gaon Music Chart. Archived from the original on September 13, 2018. Retrieved September 12, 2018.
34. C., Daniel (May 3, 2019). "Gaon's 관찰노트" [Gaon's Observation Notes] (in Korean). Gaon Music Chart. Archived from the original on October 28, 2019. Retrieved May 10, 2019.
35. ^ "Gaon Certification - Downloads" (in Korean). Gaon Music Chart. Retrieved April 11, 2019.
36. "South Korean single streaming certifications – Bolbbalgan4 – Travel" (in Korean). Korea Music Content Association (KMCA). Retrieved February 9, 2023.
37. "가온 인증(Gaon Certification) - Streaming". Gaon Music Chart (in Korean). Retrieved June 12, 2020.
38. "週間 シングルランキング (2020年01月27日付)" (in Japanese). Oricon. Archived from the original on 2020-01-22.
39. Gaon Digital Chart:
    • "Gaon Digital Chart - Week 24 (We Loved)" (in Korean). Gaon Music Chart. Retrieved 2017-06-21.
    • "Gaon Digital Chart - Week 2 (#First Love)" (in Korean). Gaon Music Chart. Retrieved 2018-01-18.
    • "Gaon Digital Chart - Week 48 (New York)" (in Korean). Gaon Music Chart. Retrieved 2019-12-05.
    • "Gaon Digital Chart - Week 3 (Awkward)" (in Korean). Gaon Music Chart. Retrieved 2020-01-23.
40. Kpop Hot 100:
    • The Kpop Hot 100 was discontinued beginning with the July 16, 2014 issue date. On the issue dated May 29 – June 4, 2017, the chart was re-established.
    • "We Loved". July 10, 2017. Archived from the original on June 14, 2018. Retrieved April 12, 2019.
    • "#First Love". January 22, 2018. Archived from the original on May 28, 2020. Retrieved April 12, 2019.
41. Gaon Digital Chart:
    • "Gaon Digital Chart - Week 6 (Lost Without You)" (in Korean). Gaon Music Chart. Retrieved 2017-02-18.
    • "Gaon Digital Chart - Week 21 (Mohae)" (in Korean). Gaon Music Chart. Retrieved 2018-06-04.
42. Kpop Hot 100:
    • The Kpop Hot 100 was discontinued beginning with the July 16, 2014 issue date. On the issue dated May 29 – June 4, 2017, the chart was re-established.
    • "Lost Without You, Mohae". June 5, 2017. Archived from the original on July 8, 2019. Retrieved April 12, 2019.
43. ^ "2017년 Download Chart".
44. Cumulative sales of "Mohae":
    • "2017년 05월 Download Chart".
    • "2017년 06월 Download Chart".
45. Gaon Digital Chart:
    • "Gaon Digital Chart - Week 51 (Hidden Path)" (in Korean). Gaon Music Chart. Retrieved 2014-12-24.
    • "Gaon Digital Chart - Week 53 (Dream)" (in Korean). Gaon Music Chart. Retrieved 2017-01-06.
    • "Gaon Digital Chart - Week 24 (You and I From the Beginning)" (in Korean). Gaon Music Chart. Retrieved 2017-06-21.
    • "Gaon Digital Chart - Week 47 (My Trouble)" (in Korean). Gaon Music Chart. Retrieved 2018-11-29.
    • "Gaon Digital Chart - Week 48 (Love Letter)" (in Korean). Gaon Music Chart. Retrieved 2021-01-07.
46. Kpop Hot 100:
    • The Kpop Hot 100 was discontinued beginning with the July 16, 2014 issue date. On the issue dated May 29 – June 4, 2017, the chart was re-established.
    • "You and I From the Beginning". July 10, 2017. Archived from the original on June 14, 2018. Retrieved April 12, 2019.
    • "My Trouble". November 26, 2018. Archived from the original on March 28, 2019. Retrieved April 12, 2019.
47. "2014년 12월 Download Chart".
48. Cumulative sales of "Dream":
    • "2016년 53주차 Download Chart".
    • "2017년 01주차 Download Chart".
49. C., Daniel (June 21, 2019). "Gaon's 관찰노트" [Gaon's Observation Notes] (in Korean). Gaon Music Chart. Archived from the original on October 28, 2019. Retrieved June 21, 2019.
50. Gaon Digital Chart:
    • "Gaon Digital Chart - Week 46 (Grumpy (Red Ickle version))" (in Korean). Gaon Music Chart. Retrieved 2016-11-18.
    • "Gaon Digital Chart - Week 53 (You(=I))" (in Korean). Gaon Music Chart. Retrieved 2017-01-06.
    • "Gaon Digital Chart - Week 40 (When You Fall in Love)" (in Korean). Gaon Music Chart. Retrieved 2016-10-06.
    • "Gaon Digital Chart - Week 47 (Grumpy (Red Planet version))" (in Korean). Gaon Music Chart. Retrieved 2016-11-25.
    • "Gaon Digital Chart - Week 40 (Blue, Fix Me, Imagine)" (in Korean). Gaon Music Chart. Retrieved 2017-10-13.
    • "Gaon Digital Chart - Week 22 (Lonely, Starlight, Dear, Teddy Bear, Clip)" (in Korean). Gaon Music Chart. Retrieved 2018-06-08.
    • "Gaon Digital Chart - Week 29 (6 o'clock)" (in Korean). Gaon Music Chart. Retrieved 2018-07-27.
    • "Gaon Digital Chart - Week 14 (Picnic, Seattle Alone)" (in Korean). Gaon Music Chart. Retrieved 2019-04-11.
    • "Gaon Digital Chart - Week 37 (Taste, Day Off, XX acoustic version)" (in Korean). Gaon Music Chart. Retrieved 2019-09-19.
    • "Gaon Digital Chart - Week 38 (25, XX)" (in Korean). Gaon Music Chart. Retrieved 2019-09-26.
    • "Gaon Digital Chart - Week 20 (Blank, Dandelion, Counseling)" (in Korean). Gaon Music Chart. Retrieved 2021-01-07.
    • "Gaon Digital Chart - Week 45 (Red Lipstick)" (in Korean). Gaon Music Chart. Retrieved 2021-01-07.
    • "Gaon Digital Chart - Week 17 (What Makes Us Beautiful)" (in Korean). Gaon Music Chart. Retrieved 2022-04-28.
    • "Gaon Digital Chart - Week 18 (Star)" (in Korean). Gaon Music Chart. Retrieved 2022-05-05.
    • "Circle Digital Chart: Week 31 (Love Story)". Circle Chart (in Korean). Retrieved August 4, 2022.
    • "Circle Digital Chart: Week 17 (Rome, When Love Becomes Goodbye, Good Night)". Circle Chart (in Korean). Retrieved April 27, 2023.
    • "Circle Digital Chart: Week 52 (Eternal Love)". Circle Chart (in Korean). Retrieved January 4, 2024.
51. Kpop Hot 100:
    • The Kpop Hot 100 was discontinued beginning with the July 16, 2014 issue date. On the issue dated May 29 – June 4, 2017, the chart was re-established.
    • "Grumpy (Red Ickle version)". August 1, 2017. Archived from the original on March 8, 2022. Retrieved April 12, 2019.
    • "You(=I)". July 10, 2017. Archived from the original on June 14, 2018. Retrieved April 12, 2019.
    • "Blue, Fix Me, Imagine". October 9, 2017. Archived from the original on January 24, 2021. Retrieved April 12, 2019.
    • "Lonely, Starlight, Dear, Teddy Bear, Clip". June 4, 2018. Archived from the original on May 28, 2020. Retrieved April 12, 2019.
    • "6 o'clock". July 23, 2018. Archived from the original on December 30, 2020. Retrieved April 12, 2019.
    • "Picnic, Seattle Alone". April 8, 2019. Archived from the original on May 28, 2020. Retrieved April 12, 2019.
52. Cumulative sales of "Grumpy":
    • "2016년 10월 Download Chart".
    • "2016년 11월 Download Chart".
    • "2016년 12월 Download Chart".
    • "2017년 Download Chart".
53. Cumulative sales of "You (=I))":
    • "2016년 09월 Download Chart".
    • "2016년 10월 Download Chart".
    • "2016년 11월 Download Chart".
    • "2016년 12월 Download Chart".
    • "2017년 Download Chart".
54. "2016년 09월 Download Chart".
55. Cumulative sales of "Grumpy":
    • "2016년 44주차 Download Chart".
    • "2016년 47주차 Download Chart".
    • "2016년 48주차 Download Chart".
    • "2016년 52주차 Download Chart".
    • "2016년 53주차 Download Chart".
56. Cumulative sales of "Fix Me":
    • "2017년 09월 Download Chart".
    • "2017년 10월 Download Chart".
    • "2017년 11월 Download Chart".
    • "2017년 12월 Download Chart".
57. Cumulative sales of "Imagine":
    • "2017년 09월 Download Chart".
    • "2017년 10월 Download Chart".
    • "2017년 11월 Download Chart".
    • "2017년 49주차 Download Chart".
58. "'음원 대세' 볼빨간사춘기 단독 콘서트, 오픈 동시 매진" (in Korean). Newsen. 2016-11-11.
59. "볼빨간사춘기, 첫 해외콘서트 티켓 2분만에 매진...예매 추가 오픈" (in Korean). Naver. 2017-07-27.
60. "볼빨간사춘기, 대만 콘서트 대성황...2천3백석 매진" (in Korean). Naver. 2017-09-12.
61. "'역주행의 아이콘' 볼빨간사춘기의 서울 단독콘서트 #전석매진" (in Korean). Naver. 2017-11-02.
62. "볼빨간사춘기 단독콘서트 현장, '시차'부터 '가시나'까지 커버" (in Korean). Newsen. 2018-01-02.
63. "볼빨간사춘기, 대만 이어 홍콩까지 홀렸다 '단독콘서트 성공'" (in Korean). Newsen. 2018-02-05.
64. "閨蜜夏日出遊的旋律！韓國創作女團「臉紅的思春期」6月底來台開唱，制霸1位的新歌你聽過了嗎？" (in Chinese). Marie Claire Taiwan. 2018-06-27.
65. "볼빨간사춘기, 두 번째 대만 단독 콘서트 'Travel Together' 개최" (in Korean). Naver. 2018-06-27.
66. "볼빨간사춘기, 대만 콘서트 'Travel Together' 성료!" (in Korean). Naver. 2018-07-04.
67. "볼빨간사춘기, 세 번째 단독 콘서트 개최···28일 티켓 오픈" (in Korean). Naver. 2018-05-18.
68. "볼빨간사춘기, 단독콘서트 '여행' 6천석 매진" (in Korean). Naver. 2018-05-29.
69. "赤頬思春期、8月10日東京にて日本1stコンサート開催決定！" (in Japanese). Kstyle. 2018-07-04.
70. "볼빨간사춘기, 첫 번째 日 단독 콘서트...2천 5백석 규모 [공식]" (in Korean). Naver. 2018-08-08.
71. "볼빨간사춘기, 4월 신곡 발표→5월 단독콘서트 '열일 행보'" (in Korean). Naver. 2019-03-23.
72. "볼빨간사춘기, 봄 콘서트 '꽃기운' 1분만에 매진" (in Korean). Naver. 2019-04-05.
73. "볼빨간사춘기, 일본-홍콩-태국-대만 亞투어 돌입 '국내 열기 잇는다'" (in Korean). Naver. 2019-05-23.
74. "볼빨간사춘기, 첫 전국투어 콘서트 'Two Five'" (in Korean). Naver. 2019-10-25. Archived from the original on 2019-12-07. Retrieved 2019-12-07.
75. "赤頬思春期(BOL4) JAPAN LIVE TOUR 2020 ～LOVE～ ローソンチケットプレリクエスト2次先行受付スタート！" (in Japanese). BOL4 Japan Official. 2019-11-14.
76. "赤頬思春期、2月に日本初ライブショーケース開催決定！" (in Japanese). Kstyle. 2018-01-08.
77. "'슈퍼스타K6' 볼빨간 사춘기, 경북 영주 출신 실력파...이승철 "기특하다"" (in Korean). EToday. 2014-08-29.
78. "볼빨간사춘기 표 '모닝콜' 대공개! | MBC 연예 스포츠" (in Korean). Enews IMBC. 2017-02-03.

External links

• Official website

• South Korean pop music groups
• K-pop music groups
• Musical groups established in 2016
• South Korean girl groups
• 2016 establishments in South Korea
• South Korean musical duos
• Korean Music Award winners
• Melon Music Award winners
• Pop music duos
• Female musical duos