Banshee Bake a Cherry Pie?

S3, E8: Peter's favorite rock-star singer Shanna O'Callahan arrives in New York turns out to be a banshee, an Irish spirit whose voice causes chaos. She is now planning to use a major rock-concert to broadcast her chaotic spell across the nation, and then, the world. When the Ghostbusters go to confront her, Peter falls under her siren spell, which complicates matters to the team.