B1A4

B1A4 (?????) is a 5-member South Korean boy group under WM Entertainment. Group name stands for member's blood type and it's acronym for "Be The One, All For One." Members are: Jinyoung (A blood type), Sandeul (A blood type), Gongchan (A blood type), CNU (A blood type), Baro (B blood type). They released their first mini-album "Let's Fly" on April 21, 2011. WM Entertainment began revealing information about their new boy group on April 17th by showing one member a day.

Members are: Jinyoung (A blood type), Sandeul (A blood type), Gongchan (A blood type), CNU (A blood type), Baro (B blood type).
They released their first mini-album "Let's Fly" on April 21, 2011.

WM Entertainment began revealing information about their new boy group on April 17th by showing one member a day. But before all photos had been revealed netizens discovered the full group's picture, as it was leaked onto the Internet.
On April 18, MV teaser was revealed showing group's cute concept.
Soon after that on April 20th, MV for title song "O.K" was released and their official website was open providing full information about the group. They made their debut performance on April 23th


Official site : www.B1A4.com