After spending an additional two years of life as a trainee after her initial debut in 2008, JOO has finally returned to her fans on today's Music Bank with her E-TRIBE-produced title track, "Bad Guy," off of her mini-album, "Heartmade." "Bad Guy" has been ranking in on major music sites such as Melon, Cyworld, Monkey3, Naver Music, Soribada and others ever since its release, and has garnered immense popularity for its powerful vocals and dramatic string arrangement. JOO expressed her gratitude towards her fans by stating, "This album depicts my feelings of running without rest for the past two years.� I'm thankful for the amount of interest it has generated." Check out her comeback stage below! Source + Photo: World Journal via Naver