Hey!
I really need help with this. I remember reading the book in a library when I was nine or ten.. so the book was of the teen variety, I'm guessing. Anyway, it was about two boys, best friends. One lived beside a girl who always tanned in her pool in her bikini... it was their goal that summer to get her to sit up when she had undone her bikini, I think. And the girl that they liked had a friend who they thought was fat. The "fat" friend went away for part of the summer and came back thin and hot, and the one boy had liked her when she was fat but didn't admit it until she came back, and I believe that was the end of the book. It was a cute teen story. I don't believe it was terribly long. I also think there was a scene in there about someone running through a screen door at the end, and the girl finally stood up. This has been driving a friend and I INSANE since we can't remember it from when we were little, and would love the author's name or title. I would be so grateful for any ideas. Thank you so much!!