Who dat, who dat?

Jimmy Fallon has pulled out his semi-ironic Neil Young impression a few times now, both during his stint on Late Night and on The Tonight Show. Earlier this year, he even got Young’s nod when the singer appeared on Tonight. Now he’s garnered the support of the rest of Crosby, Stills, Nash, and Young, as members of the group—sans Young, because Fallon—joined the talk show host last night to perform a cover of Iggy Azalea’s “Fancy.”

The clip begins as a solo Young cut, but Crosby, Stills, and Nash join in after about a minute, bringing harmonies and chants of “C-S-N-Y” in lieu of the song’s normal “I-G-G-Y” patter. C, S, and N aren’t really “in the fast lane” anymore, like the song suggests, but Crosby’s luscious locks suggests he still considers himself at least a little bit fancy these days.