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Seeing double: Jimmy Fallon performs as Neil Young with Neil Young on 'Tonight'

by Ree Hines / / Source: TODAY

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Jimmy Fallon is a master when it comes to musical impressions, as he's proved time and time again. But when it comes to singer sound-alikes, he's got one routine that rises above the rest.

No one can beat Fallon's Neil Young — except maybe the musical guest who stopped by to perform with him on Tuesday night.

Yes, as Fallon channeled the singer-songwriter for a rendition of Young's hit "Old Man," he was joined by the actual Neil Young.

The rare treat left viewers seeing double and getting twice the entertainment.

Douglas Gorenstein/NBC

And if it left you wanting more, you're in luck thanks to Fallon's past performances.

Solo:

Alongside Bruce Springsteen:

And, of course, playing the perfect fourth with Crosby, Stills and Nash:

Here's hoping there's more to Young (faux and for real) to come on "Tonight."

"The Tonight Show" airs weeknights at 11:30 p.m. ET on NBC.

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