As soon as the singer took to the stage at London nightclub G-A-Y on Saturday (10 May), she began peeling off her clothes!
First the tie came off and then Rita, 23, began undoing her shirt.
Soon enough, the trousers were off and she was prancing about in next to nothing!
Ever the pro, Rita was never going to strip off and reveal some old grey bra from the bottom of her wardrobe.
Instead, she'd opted for a bright white set from Calvin Klein.
We wonder if she chose them because DJ boyfriend (and utter stud) Calvin Harris has the same name?
The star, who has been promoting her new single I Will Never Let You Down, had obviously been looking forward to her raunchy gig.
She teased fans ahead of the performance by saying on Instagram: "Countdown begins!! #G.A.Y #seeusoon #gotasurprise"
And after her gig she Tweeted: "#IWILLNEVERLETYOUDOWN I can't breathe thank GAY for everything!! London being home is the ultimate best feeling in the world!!"
Rita's not the first singer to dial up the sexiness at the venue this week.
Just one night earlier, Miley Cyrus had sashayed around the stage with an inflatable penis and a blow-up doll. As you do.
Is there something in the water right now?!
Would you rather have been at Rita or Miley's gig this weekend? Tell us below, as the best comment from across the website each week wins £50!