Smallville: Season 4, Episode 18

4 - 18: Spirit

A stunned Chloe is nominated for Prom Queen and tries to talk a reluctant Clark and Lana into attending the dance with her. However, after her rival Dawn, a wannabe Prom queen, crashes her car into a ravine filled with kryptonite, Dawn's spirit is released and she enters the bodies of the others making them act out of character. As a result, Lana asks Clark to be her date, Lois attends the Prom and Chloe sets the school on fire. Lex gives the seniors a special gift by having the band Lifehouse play at the dance...