Jimmy Fallon is the realest—even when he's impersonating Neil Young!

On Monday's Tonight Show, the late-night host brought back back brought his impersonation of the Grammy-winning singer for a cover of Iggy Azalea's "Fancy" with Crosby, Stills & Nash.

Fallon was all decked out in his Young getup, which included the hat, the hair, the button-down and trademark brown suede jacket. With the brim of the hat pulled forward to cast an obscuring shadow above his eyes, it was easy to mistake Fallon as being the real "Southern Cross" singer at first glance!

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The folk supergroup teased Monday night's appearance on Twitter, touting a tune-in to to their Tonight Show performance as part of a CSNY (David Crosby, Stephen Stills, Graham Nash and Young) reunion. And while the real Young wasn't able to be there, Fallon did a pretty good job filling in for one of music's greatest.

Fallon has broken out his Young impersonation a time or two before, like when he performances Miley Cyrus' "Party in the U.S.A." and Willow Smith's "Whip My Hair."

Gotta keep the music fun!

(E! and NBC are both part of the NBCUniversal family.)

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