The singer wore a white, lace overlay fishtail dress that accentuated her impressive curves. Matching the colour of her stunning gown was her newly-dyed platinum locks.
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She topped off her striking look with her trademark red lipstick.
Joining Rita at the Harper's Bazaar Women of the Year Awards, where the singer picked up Best Musician, was model Jourdan Dunn.
Stunning in a black and white asymmetrical dress and white stilettoes, Jourdan fought off strong competition from best friend Cara Delevingne to take home the Model award.
Following the ceremony, the model changed into a slinky, figure-hugging gold dress that featured sheer panels and subtle tassels.
Also attending the ceremony was Victoria Beckham, who was accompanied by her eldest son Brooklyn.
The proud fashion designer couldn't resist giving her 14-year-old a big kiss as she celebrated wining the coveted Special Contribution to British Fashion award at the star-studded event .
Posing for photographs with Brooklyn at Claridge's Hotel, Victoria gazed lovingly at the aspirational footballer, who looked very dapper in a fitted black suit.
With husband David currently in New York City, Victoria turned to her eldest child to be her escort to the ceremony — and they clearly enjoyed their evening out together, affectionately cuddling up on the red carpet while posing for photographs.
Victoria, 39, looked flawless in a sophisticated floor-length black gown featuring a zip down the back and a cutaway design under the bust.
Wearing her long hair swept over one shoulder, the mum-of-four accentuated her features with smokey eye makeup and accessorized with diamond drop earrings.
Victoria and Brooklyn were joined by a host of famous faces at the awards, including Colin Firth and his wife Livia, winner of the Green Award for her environmental efforts.