공기남, 고아성 – 홍대입구 (Rap. Young Jay)
Track 01 from Single "곽태훈 부반장의 Limited Edition 2."
Release Date: 2015.05.21
고아성 – Wings Of Rod
Track 13 from Album "듀엣 OST"
Release Date: 2012.04.19
고아성 – Blue Blue Night
Track 11 from Album "듀엣 OST"
Release Date: 2012.04.19
고아성 – Light On My Shoulder
Track 03 from Album "듀엣 OST"
Release Date: 2012.04.19
고아성 – Nobody Knows
Track 02 from Album "듀엣 OST"
Release Date: 2012.04.19