Chris Brown will join the Foo Fighters, David Guetta, and Lil Wayne at the Grammy awards on Sunday for a special performance highlighting dance/electronica music. Brown’s high profile arrest for assaulting then-girlfriend Rihanna happened early in the morning that he was slated to perform at the Grammys in 2009. His performance Sunday will mark his first return to the Grammys since the incident. Strangely enough Rihanna is also slated to perform Sunday. (She’s performing on the main stage, Brown is performing outside in a tent.) Organizers said last month that Rihanna, who has four nominations including album of the year for “Loud,” will sing with Coldplay on the Grammy stage. And I’m not one to gossip, so you didn’t hear it from me… but rumor has it that Rihanna and Brown have been hanging out together. “Sources tell [RumorFix]( that the Barbadian beauty held up rehearsals for the Grammys on the Sony lot in Los Angeles, while she was behind doors with her ex” for five hours!