Pretties by Scott Westerfeld

Tally is finally pretty. She has everything she's dreamed of. A perfect face, perfect hair, perfect skin, perfect evrything. Every day of her new life is loaded up with fun. When Tally finds a note she wrote before she became a Pretty, she suddenly realizes that being a Pretty isn't as great as she thought it was, and all the fun suddenly stops. Tally needs to fight for what is right, and it won't be easy. This is the second book in the Uglies trilogy. I recommend it to everyone who read and enjoyed Uglies.