Sulli, Krystal, and Victoria of the girl group f(x), have recently become the new models for clothing brand,�Calvin Klein Jeans. The previous model for the brand was none other than the sexy Shin Min Ah, who showed off her excellent S-line in every photo. �Many were curious as to who would be her successor, and peopl were surprised to find out that it was the f(x) members. The three completely changed their cute and fresh image and are now unbelievably sexy. �The girls showed off surprisingly glamorous bodies, making fan boys faint. Calvin Klein Jeans never looked better! �Check out the photos below! [gallery link="file"]