B1A4
Musical Group
B1A4 or One Blood Type B, Four Blood Type A/ Be the One, All for One. is a South Korean idol group under the management of WM Entertainment. The group debuted in 2011 with their single “O.K”. Wikipedia
Active from: 2011
Lead singer: Sandeul (2011–)
Origin: Seoul, South Korea
Albums: Who Am I, Ignition, 1, Let’s Fly / It B1A4, The B1A4Ⅰ Special Edition
Record labels: Pony Canyon, Warner Music Group