Rihanna and Chris Brown, shown here in 2008, will appear together on a song. (REUTERS/Lucas Jackson)

With these two publicity hounds, it's hard to separate truth from fiction. A Rihanna fan forum asked one of Rihanna’s producers, Da Internz, on Twitter if Chris Brown was singing on Rihanna's track. Da Internz replied with a resounding “NOPE,” before deleting his tweet.

Rihanna, on the other hand, has not been quelling the rumors on her own Twitter feed. Instead she's been writing a series of cryptic messages about forgiving your enemies. “Music heals the world ... we need more!” one read.