You missed season 4, where it seems like she really started losing. Ofcourse you can find different pictures that won't tell the exact same because of the light, angle, clothes etc. but it's still pretty obvious that something went wrong at that point. It reflects even in her acting, which used to be better. I hope she'll never end up like Teri Hatcher, who's been anorexic long time. In Keiras defence, I've seen her first movie, and she has always been 'that way', very thin. Kristin went from very healthy to extremly unhealthy.