The Radioactive singer - who wore a Donna Karan red silk dress - revealed that she didn’t wear underwear, but was very careful about how she moved during the event.
When asked by Capital FM DJ whether she wore undies, she said: "Oh no, I didn't actually! I just literally knew my angles and I made sure that I did not move!"
She also revealed the painstaking dedication it took to achieve her raunch VMAs look, even stating she had to be sewn into the dress.
"It took a lot of altering because it was made out of pure silk so it had to literally be sewed on to my body. I just wanted something really simple that looked like a slip, that almost reminded you of lingerie but still a dress, and it was a customised Donna Karan piece.”
Rita also commented on that high thigh slip. She added: “My team and myself wanted a red dress because red is my favourite colour ... so we put a red dress on and we cut it really accordingly and it just kept getting shorter and shorter and the thigh just kept getting higher and higher! Until I thought, 'OK, we have to stop now!'"
Luckily the dress worked for her, as Rita topped many of the best dressed lists for the event.
