You probably remember in late 2010 Fallon paired his spot-on Neil Young falsetto impression with the real Bruce Springsteen for a hilarious rendition of Willow Smith's 'Whip My Hair.' Well, Bruce Springsteen week on 'Late Night With Jimmy Fallon' ended with a bang Friday night. A very sexy bang.

This time it was LMFAO's 'Sexy and I Know It' that got the awesome remix. As you can see, nobody works the crowd like Spingsteen. The Boss had the whole studio audience singing the song's ridiculous "wiggle, wiggle, wiggle" part.

Color LMFAO impressed, too. "That's the best thing I've ever seen in my life," band member Redfoo told The Hollywood Reporter about the duet. "I got two bunks open for those guys on the Party Rock Tour bus."

Friday also marked the third anniversary of 'Late Night.' For such a young (no pun intended) show, it has certainly produced its share of great musical moments.

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