VIDEO: Dave Chappelle Joins Foo Fighters on Stage for Radiohead Cover

Foo Fighters were undoubtedly going to do something special for their big, full-capacity Madison Square Garden show last night (June 20), but who knew it would be "so f-ckin' special."

The lone guest during the Foo's show was none other than Dave Chappelle, who Dave Grohl referred to as his "favorite Dave." Chappelle took to the stage and fronted a cover of Radiohead's "Creep."

The performance is embedded below in all its bizarre glory.

(WARNING: Some NSFW language ahead)