Kimberley, who is expecting her first child, shared a snap of her outfit choice for the evening on Instagram and both she and her bump looked beautiful in the bespoke, floor-length red gown!
The dress, designed by British maternity-wear designer Tiffany Rose, featured a demure lace top with three-quarter length sleeves and a long flowing skirt, separated by a red ribbon accentuating Kimberley's blossoming tum.
The 32-year-old singer took to the stage with Alistar Griffin to perform their new song 'On The Road', the official song of Yorkshire's Grand Départ 2014 - where the Tour De France kicks off this Saturday.
Her stunning appearance came after Kimberley revealed earlier in the day on This Morning that she always knew Cheryl Cole would go back to The X Factor.
Speaking about her BFF, Kimberley said that Cheryl isn't one to hold grudges and, now she has moved on from her spat with Simon Cowell, she's really enjoying being back on the show.
Watch the video for Kimberley and Alistar's song 'On The Road' here: