Prince Joins Mary J. Blige at the iHeartRadio Music Festival for 'Nothing Compares 2 U'

2012 iHeartRadio Music Festival - Day 2 - Show
Recording artist Prince (L) and singer Mary J. Blige perform onstage during the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 22, 2012 in Las Vegas, Nevada. (Getty Images)more pics »Billie Joe Armstrong may have nabbed all the headlines with his guitar-smashing hissy fit, but there were many fine musical moments at the iHeartRadio Music Festival over the weekend. Fans were treated to a spectacularly special moment late on Sunday, when Mary J. Blige was joined onstage by none other than living legend Prince.

Prince provided the guitar for Blige's rousing rendition of "Sweet Thing" before the two broke into a soulful version of "Nothing Compares 2 U," the song Prince penned for Sinead O'Connor in the '80s. The duo even invited the audience to chime in on the chorus.

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