Stacey's Ex-Best Friend — Ann M. Martin

Stacey can't wait! Her best friend from New York, Laine Cummings, is coming to Stoneybrook for a whole week. Laine can spend a day at SMS, attend club meetings, and maybe even go to the Valentine Dance.

But the minute Laine arrives, things don't go as planned. Laine thinks Stacey's sleepover with her friends is so childish. And she can't believe Stacey's still into baby-sitting. Laine's used to hanging out at high school parties. She even has a fifteen-year-old boyfriend!

Stacey doesn't want to lose her childhood friend. But Laine's growing up way too fast for Stacey. Is this the end of their friendship?