idolonfox.com Rihanna performing Live "Rockstar 101" in American Idol Rihanna, Derülo and Archuleta are the latest high-profile singers to be featured on Idol this year, following performances from Diddy and his new group Dirty Money, Usher, Miley Cyrus, Demi Lovato and Joe Jonas. All rights reserved American Idol ® FOX .com, 19 TV Ltd&FremantleMedia North America, Inc
