Rihanna believes having Chris Brown on her new album ''made sense''.

The 'You Da One' singer worked with her ex-boyfriend - who was charged with assaulting her in early 2009 - on track 'Birthday Cake' and she thinks it was sensible to have him on there because he is the best musician for the job.

She said: ''I reached out to him about doing 'Birthday Cake' because that's the only person that really, it made sense to do the record. 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.''

However the Barbados-born singer admits there was another motive behind the collaboration - getting their fans to see eye-to-eye.

She told Ryan Seacrest on his KIIS-FM radio show: ''We did two records. One for my fans. One for his fans. And that way our fans can come together. There shouldn't be a divide, you know? It's music, and it's innocent.''