Twinsies: Jimmy Fallon and Neil Young

They Team Up for a Special Duet Version of "Old Man"

We can’t prove that Jimmy Fallon and Neil Young are actually twin brothers separated by 30 years, but then again, we might not be able to disprove it either.

The classic rocker made an appearance on The Tonight Show Tuesday night (Feb. 3), so Fallon busted out his famous impression for a special, duet version of “Old Man.”

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