Christopher Pike's Last Act

In episode five of Teen Creeps, Kelly & Katai cover Last Act by Christopher Pike (1988)."This week Kelly and Katai cover Christopher Pike’s Last Act! Sometimes, opening night is curtain call for your life! Yeah? That works, right? Yeah!"

Description
From Goodreads:"Melanie was the new girl in town, a little lonely, a little bored. The she auditioned for the school paly and won the starring role. Suddenly she had a whole gang of exciting friends. But these friends shared something that Melanie did not know, something from the past. Something so terrible that none of them would ever talk about it. Until after the play's opening night. When the police came for the body, and for Melanie..."