Block B is a 7-member South Korean hip-hop group that was created by 조PD, previously under the label Stardom Entertainment. Block B filed a lawsuit against the label in January 2013, which they lost. An agreement was reached nevertheless. They left Stardom Entertainment and came back in September 2013 under the label Seven Seasons.
Their first single album "Do U Wanna B?", along with the title's track MV '그대로 멈춰라!' (Freeze), were released on April 14th, 2011.
Previously known in the underground hip-hop scene by Blockbuster (블록버스터), the group had several changes until their current formation: Zico (leader, group's producer and rapper), Jaehyo/안재효 (sub-vocal), B-Bomb (main dancer and sub-vocal), Taeil/이태일 (main vocal), Park Kyung/박경 (rapper), U-Kwon (dancer and lead vocal) and P.O (rapper).
The members were trained by Cho PD to work on writing and composing about 100 songs over the course of their training period. Training them to become a singer-songwriters, he hoped to expand their experience and competence level, as well as promote "expert ease".