Silver

Silver by Mazer, Norma Fox. mass_market edition. ISBN: 9780380750269.

My mother is determined that I will have a wonderful life -- better than her own. I guess she cant imagine what it is like for me, a kid from a trailer park, to transfer to the junior high school where all the rich kids go -- the kind of kids who come from homes where my mother works as a cleaning woman.... But somehow, miraculously, Ive become part of a little clique of pretty and popular girls who have everything money can buy. And sometimes they also have secrets in their lives more painful than anything Ive ever known.