(CBS NEWS) – Crosby, Stills and Nash got “Fancy” on “The Tonight Show with Jimmy Fallon” Monday night.

David Crosby, Stephen Stills and Graham Nash lent their harmonies to a rendition of the Iggy Azalea summer hit. Fallon accompanied the trio doing his best Neil Young. So it was almost like a CSN&Y reunion. Almost.

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Fallon is known for getting his guests to play along with renditions of popular songs. He’s successfully done it with Bruce Springsteen with “Sexy and I Know It” and “Whip My Hair.”

Crosby, Stills and Nash just released a re-mastered box set commemorating a 1974 tour with Young.

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Watch the video at CBSNews.com

Crosby, Stills and Nash is set to perform at the San Jose Civic Auditorium on September 19.

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