Kanye West Disses Kim Kardashian's Ex in Surprise 'Late Night' Performance (Video)

The rapper debuted the live version of "Bound 2" off his latest album, "Yeezus."
Lloyd Bishop/NBC
Kanye West on "Late Night With Jimmy Fallon"

Kanye West made a surprise appearance on Monday's Late Night with Jimmy Fallon, performing "Bound 2" off of his new album Yeezus, for the first time anywhere. West also used his time on stage to dis Kim Kardashian's ex Ray J.

West's first appearance on Fallon's talk show was such a big deal, the show couldn't announce it ahead of time, Fallon explained on the air before revealing the surprise to cheers from the audience.

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West took the stage at the end of the show, backed by Charlie Wilson and the Roots, but he had another surprise planned.

The rapper changed "Bound 2's" opening lyrics, "All them other n----s lame, and you know it now" to "Brandy's little sister lame, and he know it now," a reference to Brandy's only sibling, her little brother Ray J, the infamous sex tape partner of West's current girlfriend.

West recently announced he's embarking on his first solo tour in five years, kicking off Oct. 19 in Seattle. Tickets go on sale starting Friday.