This is 20-year-old supermodel Karlie Kloss. Those were her ribs, before the October issue of international fashion magazine Numéro Photoshopped them out.
According to Celebuzz, this is not the first time Kloss’ thin frame has caused controversy. Last December, Vogue Italia had to remove photos of the model from their site after people copied them onto their pro-anorexia websites. The original photo for Numéro, taken by Greg Kadel, shows Kloss’ jutting ribs, sternum, and collar bones.