Rihanna reveals reasons behind Chris Brown duet

Rihanna has revealed why she chose to duet with ex-boyfriend Chris Brown on a remix of her track, 'Birthday Cake'.

The star caused controversy (again - yawn) when she 'shockingly' chose to team up with the man who beat her up in 2009. Now, she has revealed why she chose Brown to duet with on US radio.

"I reached out to him about doing 'Birthday Cake' because that's the only person that really, it made sense to do the record," she told host Ryan Seacrest. "Just as a musician, despite everything else, that was going to be the person.

"You know, I thought about rappers, and I've done that so many times, and the hottest R&B artist out right now is Chris Brown. So I wanted him on the track, and then in turn he was like, 'Why don't you do the remix to my track?' and it was a trade off."

Rihanna invited Brown to appear on the sexually charged track in return for her appearance on his track 'Turn Up The Music'. Listen to 'Birthday Cake' below.

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