Crosby, Stills & Nash Cover Iggy Azalea's 'Fancy' on 'Jimmy Fallon'

“Fancy” is going folk. On Monday’s “Tonight Show,” Jimmy Fallon dressed up as Neil Young to cover Iggy Azalea’s chart-topping hit with some help from folk supergroup Crosby, Stills & Nash.

Jimmy played guitar and harmonica before the Rock and Roll Hall of Famers joined him on stage. They even switched up some of the lyrics to include “Who dat? Who dat? C-S-N-Y.”

Iggy was blown away by the performance. “This made my whole day, so amazing – I am not worthy!” she said. “Thanks to whoever came up with this idea… Brilliantly done guys.”

“Weird Al” Yankovic has also parodied “Fancy” on a song called “Handy” for his upcoming album Mandatory Fun.

Watch C-S-N-Y cover I-G-G-Y.