After getting bumped back a day thanks to a rain-delayed ALCS game, 'The X Factor' (Thu., 8PM ET on FOX) kicked off the 'Judges' Houses' round of the competition, featuring the final 32 competitors. And to whet our appetites for what's to come, we're being treated to full performances from each of them as they sing for their spots in the Top 16.

L.A. Reid, who's mentoring the Boys category, brought in Rihanna to help him make the tough decision of which four boys to send home. But he made the challenge even harder for Phillip Lomax by tasking him to sing a Rihanna song in front of the woman herself.