Celebrity | Rihanna New Rihanna Song Features ... Chris Brown 'Birthday Cake' remix to 'shock the world': producers By Matt Cantor Posted Feb 17, 2012 9:45 AM CST Copied In this Aug. 21, 2011 file photo, singer Rihanna performs on stage. (AP Photo/Joel Ryan, file) Looks like Rihanna and Chris Brown are more than making up. Almost three years after Brown pleaded guilty to assaulting his ex, the two are collaborating on an upcoming single, MissInfo reports. The producers of "Birthday Cake (Remix)" had earlier said that the song's featured artist was "gonna shock the world." Indeed. Brown reportedly raps on one verse and sings on a second, though it's unclear if that's what will be in the final cut; the single is due out next week. Meanwhile, Brown reportedly came to Rihanna's birthday party following the Grammy Awards (click to see her risque cake); the two have also been clubbing together, Vibe notes. (In other Chris Brown news, he's reportedly been using a really tasteless pick-up line...) Read These Next Baltimore QB 'forgot where I was' and shoved an opposing fan. She walked out on her gig due to JD Vance, doesn't regret it. Trump's reception at US Open isn't warm. She was born at a McDonald's, so obviously this is her nickname. Report an error