Round 3 is by which South Korean actor and singer, and the leader and main rapper of boyband SS501?
Round 3: Round 3 is Kim Hyun-joong's third Korean mini-album, which was released on July 22, 2013. Kim Hyun-joong: Kim Hyun-joong (; born June 6, 1986) is a South Korean actor and singer, and the leader and main rapper of boyband SS501.
i don't know