At this past weekend's Chiller Theatre, Alice Cooper told one of my friends that he and his band were invited to play at the premiere. Don't know fans will be able to get to any of this; security blocks the surrounding area off pretty early in the day. But if Alice is playing, you should be able to hear him if you're in the vicinity.
Isn't it more likely that he'd play at the premiere after-party rather than at Grauman's?