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B1A4 (Korean: 비원에이포) is a five member South Korean boy band founded by WM Entertainment in 2011. The band consists of Jinyoung (leader), Baro, Gongchan, Sandeul, and CNU (Shin Woo). They have gained much interest due to being first introduced in a webtoon and for their unique sound mixing pop with rock for their debut album. Their group name, B1A4, has been explained as being due to one member having B blood type, and the other four having A blood type. It also stands for "Be The One, All For One" .
History
2011: Debut 'O.K'
B1A4 debuted on April 21, 2011 with their debut track 'O.K' off of their album 'Let's Fly' and released a music video. They were first introduced to the world through the creative marketing of webtoons before their actual pictures were released. Their debut album 'Let's Fly' includes a song written and composed by the leader Jinyoung. As rookies, this garners much interest being that most debut albums contain little input from the members.
Members
Jinyoung - Leader, Vocalist
Birth Name: Jung Jin Young (정진영)
Born in : 1991.11.18
Blood type: A
Height/Weight: 178cm/59kg
Skills: Song writing, singing, acting
Baro - Main Rapper
Birth Name: Cha Sun Woo (차선우)
Born in : 1992.09.05
Blood type: B
Height/Weight: 178cm/63kg
Gongchan - , Vocalist
Birth Name: Gong Chan Shik (공찬식)
Born in : 1993.08.14
Blood type: A
Height/Weight: 181cm/60kg
Sandeul - Main Vocalist
Birth Name: Lee Jung Hwan (이정환)
Born in : 1992.03.20
Blood type: A
Height/Weight: 178cm/62kg
CNU - Vocalist, Rapper
Birth Name: Shin Dong Woo (신동우)
Born in : 1991.06.16
Blood type: A
Height/Weight: 182cm/64kg