The Source claims that Jay-Z threatened to cancel his performance at last night's BET Awards if Chris Brown was allowed to perform his scheduled tribute to Michael Jackson. Though Brown had rehearsed for the show three days in advance, Jay-Z used his considerable influence to shut him down, most likely as a form of revenge against the singer, who has been charged with domestic abuse against Rihanna. As a result of this last-minute decision, Ne-Yo and Jamie Foxx were forced to play extra songs to fill up time in the broadcast. [Source]