There are reports Chris Brown will be featured on Rihanna’s, “Birthday Cake,” remix, which will drop on her birthday. Chris Brown then tweeted today the tweet above which makes it appear, Rihanna, will be on his, “Turn Up The Music,” music. Chris Brown was spotted at Rihanna’s birthday party so they are clearly back on speaking terms. But don’t assume they are a couple , I saw Chris Brown and his girlfriend at LAX Tuesday night.