Banshee Bake a Cherry Pie?

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 plannign to use a major rock-concert to broadcast her chaotic spell all over the world. When the Ghostbusters go to confront her, Peter falls under her siren spell, which complicates matters to the team.