Lee Changsub is a South Korean singer and member of the popular boy group BTOB, which debuted in 2012 under CUBE Entertainment. Known for his powerful vocals and charismatic stage presence, he has gained recognition for his contributions to the group's music and performances. In addition to his work with BTOB, Lee Changsub has pursued solo projects, showcasing his versatility as an artist. He has released solo songs and participated in various television programs, further establishing his presence in the South Korean entertainment industry.