f(x) 에프엑스 ~

F(x) is a mathematic symbol and when you imput different "x" you can let different outcomes. So, as f(x), we want to be that kind of group that can change and adapt in may situation" - Krystal

f(x) BTS Video from Red Light 

f(x) promoional photos from SPAO

f(x) Sulli promotional photos from Etude House

f(x) Sulli promotional video from Etude House

f(x) Red Light performance at Music Bank [140718]

f(x) winning at Music Bank [140718]

F(x) - Red Light performance at Music Core [140719]

f(x) winning at Music Core [140719]

[ENG] f(x) Winning + Encore stage at Inkigayo [140720]

[1080*] F(x) - Red Light performance at Inkigayo [140720]