Crosby, Stills, Nash & 'Young' Reunited On 'Tonight Show Starring Jimmy Fallon,' Perform Iggy Azalea's 'Fancy' [VIDEO] - Jimmy's Neil Young Impression Makes History!

Jimmy Fallon's fan favorite Neil Young impersonation came in handy this week when special guest performers David Crosby, Stephen Stills, and Graham Nash came on to reform the folk super group Crosby, Stills, Nash & Young. Sure the "Young" part was fake, but they performed Iggy Azalea's hit song "Fancy," so we don't even care!

Though actually seeing this group reunite would have been incredible, Fallon's Young impression might suffice for now. Fans will surely agree that this is a chilling version of the rap/pop hit from Azalea, which definitely shows how these old dudes can still get down!

This performance starts off as just "Neil Young" performing the tune, which is funny enough, but the legendary musicians eventually pop up to help their old friend out.

"I'm so fancy/You already know/I'm in the fast lane/From L.A. to Tokyo."

"Let's get drunk on the mini bar," was maybe the best part of the performance. Crosby was a bit too comfortable singing that part, though!

The performance ends with a great little CSNY melody that we should all know, with some help from the Roots.

Take a look at this great performance, throwing harmonies into the modern hit and showing the youth of today that these old dudes can still be hip enough to sing a song about being "Fancy."

What did you think of this performance? Maybe Neil Young will actually stop by The Tonight Show one time to show Fallon what's up!