Last week Rihanna tweeted some hints at a collaborator on her track Birthday Cake. The world assumed she was wanting Christina Aguilera, but is Chris Brown the real collaborative?

Recently Rihanna tweeted that her single Birthday Cake needed some Dirrrrtyy on it.  Most people assumed it would be Christina Aguilera, I personally thought of Nelly.  Nobody gets dirtier than Nelly. But could we all be wrong?  Rumors are the collaborator is Chris Brown.

The two have been rumored to be seeing each other a lot lately. Popping up at the same parties, including Rihanna's Birthday party.
After the producers of Rihanna's "Birthday Cake" remix promised a "shocking" addition to the track, and Miss Info is now reporting that the controversial addition is ... Chris Brown.
The song is set to be released this week.
Since his 2009 incident where he beat the pulp out of Rihanna, Breezy has been working very hard to make a come back. And so far it seems to be working. Not only has he had several hits, he just won a Grammy.
He is far from perfect, though. He seems to have a problem controlling his temper. Just last year he lost his temper on the set of "Good Morning America," breaking a window and storming off the stage. He is often sending out hateful and unprofessional tweets to his fans and "haters."
So why would Rihanna want to collaborate? I have no idea, but she really needs to get a grip. Rumors float around that she likes a bad guy and all the sneaking around. Well she didn't like it when he beat her, now did she.
What do you think? Do you think this collabo is a good idea?

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