I liked the premise. Nothing else. 
 The girl - what's her name - sure is bossy. She demands perfection from everyone but herself. (Gosh look at that I'm bitching. I might just be annoyed by her so do ignore this if possible and form your own opinions. I'm just ranting.) 
 Finley, I think, is anorexic. It was kind of interesting to know how an anorexic person thinks like, so that was insightful. But I didn't actually like how she shouted at everyone - her friends, parents, and even her *gasp* superstar secret boyfriend. What makes her think she has the right?! Not like they knew what to do nor had a trace of character of their own, though. 
 If you were interested in the blurb like I was, I suggest books Like "Good For You", "Just the Sexiest Man Alive" etc.