Jimmy Fallon probably has a better Neil Young impression than Neil Young. He was able to put it on display with Crosby, Stills, and Nash on Monday's (7/7) "Tonight Show."

Jimmy performed a folkier version of rapper Iggy Azalea's chart-topping hit "Fancy."

Crosby, Stills, and Nash returned to the stage later in the episode to perform the classic "Teach Your Children." The trio appeared on the show to promote the new Crosby, Stills, Nash, and Young live box set called "CSNY 1974."

This album features live sets from Crosby, Stills, Nash, and Young from the famed 1974 reunion tour. You can expect to find classics as "Suite: Judy Blue Eyes," "Our House," and "Ohio."

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