We love Jimmy Fallon's frequent musical guests on The Tonight Show, but we love it even more when he joins them for a song!

This time, the enthusiastic host channeled Neil Young for a folk-rock rendition of rapper Iggy Azalea's current hit, "Fancy." Though he began the song as a solo, he was soon joined by Neil's occasional bandmates, David Crosby, Stephen Stills and Graham Nash for a spirited performance.

Enjoy the clip below as well as Jimmy's hilarious impression of the famed Canadian rocker!