f(x)'s Amber showcased her superb vocals to her fans.

On September 17, the f(x) member uploaded her beautiful cover of A-mei's "I Want Happiness" on her YouTube account. The video shows Amber singing passionately into the mic with her eyes closed. Amber's voice suits well with the shade of darkness that filled the room.

Watching this makes you want an f(x) comeback even more. Check out the full cover below!