Jimmy Fallon does a great Neil Young impression.

The Tonight Show host has covered several songs over the years while impersonating the legendary singer-songwriter.  On Monday night, Fallon took on Fancy, which is a popular song by Iggy Azalea.

But, he had some help.

David Crosby, Stephen Stills, and Graham Nash joined Fallon for what was not exactly a Crosby, Stills, Nash, & Young reunion.  But, it was still pretty sweet.