Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
"Bravo Bravo" (stylized as "Bravo☆Bravo") is the title of the ninth single by Hello! Project unit Buono!. The title song is the first song used for the ending theme of the anime Shugo Chara Party!, and the ninth of the entire series. The single was released on December 16, 2009, in Japan under the Pony Canyon label in two different versions: regular and limited. The limited edition came with a serial number card, used in a promotional draw, a special DVD and a Buono! trading card, as well as having an alternative cover. The DVD contains footage of the "making of" the jacket photography for the single. The first press of both editions came with a photocard. The Single V was released on December 22, 2009. The single peaked at #4 on the weekly Billboard 100 charts, selling 18,086 copies in its first week.
To commemorate the group's first live tour, copies of the CD were sold during their performance at Tokyo Kōsei Nenkin Kaikan, and all buyers were entered into a lottery to win an autographed poster, presented to them by the girls.