Chen (Exo) Feat Krystal(F(X)
S.M. THE BALLAD — 좋았던 건, 아팠던 건 (When I Was… When U Were…) (Sung by Krystal of f(x) & CHEN of EXO) 03:53
Chen (첸) (EXO) feat Krystal (f(x)) — When I was when you were 03:50
EXO Chen & f(x) Krystal — When I Was... When U Were... (좋았던 건, 아팠던 건) [SM The Ballad] 03:54
S.M. THE BALLAD — When I Was... When U Were... KRYSTAL & CHEN 03:54
SM THE BALLAD: Krystal [f(x)] & CHEN [EXO] — When I Was… When U Were… (Korean Ver.) 03:53