The Hot Right Now singer is constantly likened to the Barbadian star, with people finding similarities in their looks and music.
But Rita told The Sun that she and the Diamonds singer aren't all that alike.
Asked if she was fed up of being referred to as the new Rihanna, Rita said: "A bit. She's incredible... but we're just so different.
"First off, I'm just a little girl from the 'hood in east London, and she's an island child.
"Also, her bum is much better than mine."
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Your forceful personality makes people sit up and take notice of you. This is a great time to show off your expert knowledge. Demonstrating a command for facts and figures will result in a teaching or media position. Make sure you don't impose this air of authority at home. Your family won't appreciate being ordered around. You may be a superstar in intellectual circles, but you're just another relative on the domestic front. Don't bristle at your loved ones' irreverence. It's good for your ego.More