I love Jimmy Fallon.  His Neil Young impression is so great, you'd almost forget it's Jimmy.

Friday night Jimmy Tweeted that he hoped his followers would tune in, as it was one of his favorite episodes.

Not only was Bruce Springsteen and the E Street Band Rocking Fallon's stage, Jimmy as Neil Young was joined by Bruce Springsteen for what may be the greatest LMFAO cover to date!

Wiggle wiggle wiggle wiggle wiggle.  Yeah.