Title: Prom Date
Author: Diane Hoh
Published: May 1, 1996
Publisher: Scholastic, Inc.
Pages: 284
Summary:
It's the biggest event of the year at Toomey High - Prom Night. Popular girls like Stephanie and Kiki will be going, but Margaret and her friends do not have dates. Then Stephanie is found murdered, and Kiki has a nasty accident. Is someone trying to kill off the competition? (fantasticfiction.co.uk)
Oh how . . familiar. I'm guessing this was a really popular theme back in the 90s. I'm pretty sure I read one just like it by RL Stine, where one chick goes totally insane because she doesn't like competition so she starts killing off prom queens. In fact the title was PROM QUEEN. I'm wondering how similar this one is.