If one were trying purposely to minimize their chances of success in the music business, they could, say, try to convince the members of Iron Maiden to open for Ashley Simpson. On the other hand, they might hire Celine Dion to sing a few cuts on an Anthrax tribute album. Truly daring souls could always ring up the boys in Metallica and ask them to write a tune for Hilary Duff's next Lizzie McGuire movie.