Cabot, Meg. How to Be Popular 2006.
Fans off Cabot's Princess Diaries series will also enjoy this book. The narrator, Steph Landry, is in love with Mark, the HS quarterback and class President. She realizes that she needs to become popular to get him to like her. She finds an old book in the attic that teaches the reader to be popular. She follows the guidelines and does, in fact, get into the popular crowd. Things go awry (obviously, or there wouldn't be a point to the book!). Mark's girlfriend Lauren doesn't take kindly to Mark's attentions toward Steph and starts sending her hate email. At the same time, Steph's friend Becca is in love with their mutual friend Jason, and keeps begging Steph to find out if he likes her.
This was a really cute book. The main character is less neurotic than Princess Mia, but she is still pretty funny. Recommended for anyone that enjoys some great chic lit.