Iggy Azalea's 'Fancy' is the No. 1 song in the country so it was inevitable that someone was going to parody the tune. Thankfully, Jimmy Fallon does a superb job of covering the hit single in the only way he knows how -- as legendary rocker Neil Young.

On Monday night's (July 7) episode of 'The Tonight Show,' Fallon (as Young) warbles Azalea's catchy lyrics with such urgency that you would think 'Fancy' was actually a song about world peace.

Backing him up on the chorus was none other than David Crosby, Stephen Stills and Graham Nash of folk-rock supergroup Crosby, Stills & Nash.

Although the real Young wasn't able to be there, Fallon did a spot-on impression complete with a harmonica riff. The group then ends their performance with a quick ending from ‘Suite: Judy Blue Eyes.’

Fallon has appeared as Young previously for a funny cover of ‘Party in the U.S.A.’ by Miley Cyrus, and 'Whip My Hair' by Willow Smith.

If you're getting tired of hearing 'Fancy' on the radio, check out Fallon's hilarious new take of the song.