Rihanna and Katy Perry have recorded together, but the results will not be released on Rihanna's latest album.
The singers were rumoured to have collaborated for a track on Rihanna's forthcoming album 'Loud'; however, while they have been in the studio, the results are yet to be released, according to the 'Only Girl (In The World)' singer.
Rihanna told MTV: "We're actually working on some music together - hell yeah. I would love to tour with Katy. She's a rock star. And when I see her live, she just brings such a fun vibe, like a colourful rock star.
She has all these props. She has candy and fruit and a blown-up ChapStick onstage, but then she's rocking out with a guitar and banging her head and swinging onstage and crowd-surfing.
"That's the s**t that just makes you excited when you see her perform. She's beautiful, but then she rocks out."
Rihanna has recently said she has learned the importance of putting herself first in both her career and personal life.
She said: "The most important thing is to be happy and true to yourself. I don't want to look back at this in 30 years from now and say, 'I did it all to make them happy and I didn't enjoy.'
"I want to be able to say people loved me because of who I am. People have a lot more respect for you when you're yourself and let them see your imperfections."