My Babysitter's a Vampire S02 E09 Siren Song

Ethan and Benny discover that a local singing sensation may have a voice like an angel, but in reality she's a Siren - a mythical creature whose song brings out the self-destructive worst in anyone who hears it. They have to team up with Sarah, Erica and DJ Rory Megabat to form a band, and blow her off the stage at the school talent show.