'Neil Young' Sings 'Fancy' With Crosby, Stills And Nash On Jimmy Fallon

Jimmy Fallon, the reigning king of late night, owes his crown to musical comedy.

From his History of Rap bits with Justin Timberlake to "Slow Jamming The news with Barack Obama his performances of "Call Me Maybe" and "Let It Go" with The Roots playing children's instruments, Fallon's musical skits have been the viral fuel to his success.

One of the first to break, though, was when Fallon dressed up like Neil Young to sing Willow Smith's "Whip My Hair" with the real Bruce Springsteen.

It's an impression he's returned to repeatedly, but really upped the ante last night by bringing "Neil Young" back again to perform Iggy Azalea's chart-stomping hit "Fancy" with Young's former real-life bandmates Crosby, Still and Nash.

Enjoy!