Other surprise, guest mentors to appear tonight
Rihanna joins L.A. Reid to mentor the male contestants on "X Factor" tonight, Thursday and next Tuesday, Fox announced.
The news confirms a report by TMZ last month that said the "Umbrella" singer would help mentor contestants.
This week, the 32 acts that survived the show's "Boot Camp" will visit a judge's home or another location of his or her choice, where the judge will mentor them toward trying to earn a place on the live shows.
Rihanna will help Reid, and "additional superstar guest mentors" will join the other judges, Fox said. The other mentors will be revealed tonight.