Music cred: In the United States? None. In England? None, but she has some hit singles. Let's be real, this wouldn't be about musical cred.

Why she would be good: Adorable dimples. Adorable accent. And several years experience as a popular judge on the UK "X Factor." 

Why she could suck: The rumors said Simon Cowell dismissed Cheryl Cole from the American "X Factor" early in auditions last year because her accent was hard to understand and the chemistry wasn't right. What if he wasn't wrong?

Chances: On one hand, bringing Cheryl Cole back would be Simon admitting he was wrong, which doesn't seem likely. On the other hand, Simon "admitting he was wrong" worked out pretty well for "X Factor" winner Melanie Amaro. - Daniel Fienberg