OMG! Is this Sulli?

Watch out! The five member girl group, f(x) is coming back next month.

Before the official release of the girl new album on May 4, SM Entertainment revealed the new album teaser pictures of Sulli andAmber earlier today.

In the photo, Sulli appeared in dyed blonde hair. It’s a 180 degree change from her previous sweet cute attire. On the other hand, Amber still rocks in her boyish appeal.

Want more? Check out their official website at http://fx.smtown.com!