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Kym wowed in a clingy royal blue frock that effortlessly poured over her killer curves, showing off her sensational physique in all its glory.
Kym went sans bra for the occasion as she was keen to bring sex appeal to the red carpet but unknowingly, she accidentally exposed her assets to her onlookers.
But seemingly unaware of the mishap, Kym continued to beam for photographers as she put on a stunning display.
Kym has now been in the spotlight for 18 years after first auditioning on TV takent show Popstars.
Her group which consisted of Danny Foster, Noel Sullivan, Suzanne Shaw and Myleene Klass won the show and the band went on to have a string of hits.
Undoubtedly their most famous hit was debut track, Pure and Simple, which took the top spot in the UK charts.
Corrie’s Kym Marsh sexiest looks through the years

Kym plays straight-talking Michelle Connor in the show and has been at the centre of many gritty storylines.
Last year Michelle and fictional hubby Steve McDonald (Simon Gregson) suffered a heartbreaking miscarriage on the programme and Kym was awarded The British Soap Award for Best Female Dramatic Performance of her portrayal.
Kym recently praised controversial Corrie producer Kate Oates for the grittier storylines on the show and hopes it gets even darker.

POSING UP A STORM: Kym Marsh looked stunning as she wowed onlookers
“I’d actually like more psychopath stuff. I’d like my character to be one. It would be great being a baddie. Anyway who wants a happy ending on soaps?”
Kym’s comments come after it was revealed that TV watchdog Ofcom had received complaints over the Pat Phelan (Connor McIntyre) murder rampage story and the David Platt (Jack P Shepherd) rape story.
Ofcom ruled the show did not break guidelines by screening too much violence ahead of the 9pm watershed.