B/R

Given that it was Game 4 of the Eastern Conference semifinals, the United Center didn't really need any help getting hyped up Sunday. However, Kanye West got the Chicago crowd on its feet with an impromptu performance during the game.

During a timeout break in the first quarter, West took the microphone and gave the crowd a brief rendition of "All Day" off his upcoming album.

Warning: Video contains NSFW language.

West and Chicago Bulls great Scottie Pippen spent some time together as well, it looks like.