Block B was created in 2011 in Seoul. The idea and the funding belong to a popular rapper and producer Cho PD. Initially, he called it Korea's Eminem Project. The producer spent about $1.4 million to put the band together and do some initial promotional work. The lineup includes seven young men, Taeil, Jaehyo, B-Bomb, Park Kyung, U-Kwon, Zico, and P.O.
In April 2011, the artists recorded a video for their song "Freeze!”. However, the debut music video wasn’t allowed for viewing on TV before 10 p.m. due to the erotic content. However, such restrictions didn’t stop the band from becoming popular. Soon the group appeared on the show Music Bank on KBS with a single "Wanna B”. It later became a part of the artists’ debut album.
In September 2011, the group presented its debut EP, New Kids on the Block. The album climbed to the 3rd spot of South Korea Gaon Album Chart and sold 24.5 thousand copies. Such a result was impressive for the young group. Right after the album’s release, Cho PD began getting offers from organizers, who wanted to book Block B for private events.