I'm dreading Many of Horror although ironically it's probably one of his most interesting Song choices
Poor Rebecca doesn't stand a chance, Cher will never get to perform hers and I think depending on how it's done One direction could steal it. It'll still be shocking but it depends on how they choose to adapt the songs really.
EDIT: I've reaquainted myself with Distant Dreamer, Rebecca's not as boned as I thought. She could do a good job of it.