The 34-year-old mezzo-soprano turned heads at the National Maritime Museum in Greenwich, London wearing a blush pink gown paired with a silver belt and matching sparkly clutch bag.
Katherine, who married Andrew Levitas at Hampton Court Palace in September, completed her glamorous evening look with red carpet-worthy jewellery, hair and make up - statement-making diamond earrings, side-swept curls and smoky eyes.
Of course, Katherine wasn't the only star to wow at the awards.
TV presenter Amanda Holden made a good case for wearing all white while actress Emilia Fox was stunning in a red lace gown.
As for Mr Beckham? He managed to outshine everyone else on the red carpet and looked more dapper than ever in a tuxedo.
This latest look from Katherine is a contrast to the last time we saw her out and about. She looked super-stylish in a dove-grey crepe shift dress from Topshop during a promotional tour of her new album Home Sweet Home in November. The price tag? A wallet-friendly £45.
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