Lee Chang Sub is a South Korean singer. He is a member of Cube Entertainment’s boyband BtoB, which debuted in 2012. He studied Practical Music at Howon University. Prior to his debut as an idol, he won a Daesang at the 16th Suwon Music Festival 2008 and even became vice president of Red Cross Youth Gyeonggi Province in 2009.
He enlisted for his mandatory military service on January 14, 2019. On July 24, he recorded a special single— a new theme song for the ROK Army alongside Shinee’s Onew and Key, Exo’s Xiumin, Infinite’s Kim Sung-kyu, 2AM’s Jo Kwon and Jinwoon, Yoon Ji-sung, and actors Kim Minseok, and Lee Jae-kyoon. He was discharged on August 21, 2020.
On February 21, 2022, BtoB made their long-awaited comeback as a six-member group with their third studio album “Be Together,” featuring the emotional title track “The Song.” composed by member Hyunsik.