Better update that list of May comebacks, folks! It has been announced that girl group f(x) will make an official comeback to the K-pop scene on May 4th with a brand new mini-album. After consecutively releasing of LA chA TA and Chu~?, the five girls of f(x) began to expand their activities in various fields, ranging from modeling for Andre Kim to volunteering in Africa.  After mere months since debut, f(x) has already dominated the music charts, on top of scoring numerous endorsement deals. Today, on the 27th, f(x) unleashed a couple teaser comeback photos capturing Sulli and Amber looking radically different in their new concept. Though still sixteen going on seventeen, Sulli looks mature in her solo shot. Her hair seems to be inspired by Lady GaGa who has rocked a similar 'do in the past. Two down, three to go. The teasers of the rest--Victoria, Luna, and Krystal--are expected to be revealed soon, so be ready for them.