After promoting as SS501's vocalist for seven long years, Heo Young Saeng made his debut as a solo artist on today's episode of "Music Bank" with his title track, "Let It Go"! As it was his first solo debut stage, Young Saeng was buoyed by the presence of his SS501 group mates, Kim Hyun Joong and Kim Kyu Jong who showed up backstage to show him their support. Produced by Sweetune, the song describes the different ways men and women approach love, and the misunderstandings that result from it.�Joining Young Saeng is 4minute's HyunA with a rap part expressing the inner feelings of women although she didn't appear on stage due to another schedule. This urban pop song has both a simple but strong beat with a combination of both ballad and dance and an upbeat chorus that brings out the best in Young Saeng's sweet voice and HyunA's powerful rap. Check out his debut stage below! Source: Daum Music