Junior High #8: Starring the Eighth Grade by Kate Kenyon (Good, 1988, pbk, 172 pgs, Scholastic)

Ever since the eighth grade has been invited to join the high school production of Grease, all the world's a stage - and everyone is acting crazy! Tracy and Denise are going for the same part. Nora and Jen, best friends forever, are suddenly against each other. Nora is coaching Tracy. Jen is helping Denise. Jen is getting starstruck herself. The stage, she declares, is meant to be her life.

As opening night approaches, everyone gets more and more distracted.  Will the play go on?