'X Factor' Celeb Mentors: How Did Rihanna, Pharrell Fare?

By James Dinh
It's clear "X Factor" isn't scared to tack on some star power to their much-hyped talent competition; just take a look at the judging panel. And after catching Thursday's night's delayed episode, which featured Rihanna, Pharrell, Enrique Iglesias and Mariah Carey (sort of), it's even clearer.

In an episode that sent all 32 contestants [...]

Spencer Pratt Rihanna Bill Paxton Demi Moore