The 'Radioactive' singer kept all eyes on her as she wore a sequinned crop top and shorts teamed with silver heels for a performance at The Box.
Rita channelled old Hollywood glamour sporting short slicked back hair with glitter applied on the curls. She finished off her look with bright red lipstick.
Taking inspiration from Angelina Jolie's famous Oscars pose, Rita looked fierce as she held out her right leg while pouting for the camera.
Rita was joined backstage by her close friend and TOWIE star Vas J. Morgan, who had nothing but praise for the 23-year-old.
After posting a photo to Twitter, proud friend Vas said: "My boo killing it at The Box."
It was a long night for Rita, who had earlier joined Iggy Azalea on stage at London's Shepherds Bush Empire before dashing to Soho for her secret gig.
What a busy girl!
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