f(x)'s Sulli, Victoria, and Krystal are the new models for Calvin Klein, and two pictures were released today that showed off their curves, sexy femininity, and slim body line for the new X Jeans . Their lovable and lively personalities brimmed even more through the fashionable denim jeans. With the extreme skinny fit X Jeans wrapped around their legs, these photos just ooze with their womanly auras.