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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A close relationship could reach a rocky patch. Resist the urge to emotionally withdraw from your loved one. Be willing to address the issues that have been pulling you apart. You could hear some painful things about your behaviour. Instead of getting defensive, be open to changing for the sake of your relationship. Think back to a time when someone you loved worked hard to gain your affection and approval. Pattern your attitude after theirs. Being flexible is more important than being right.More