The Girls Aloud star attended the Animal Hero Awards at the Langham Hotel with her boyfriend Mark Foster and their pet dog on Thursday night (28 November).
Sarah showed plenty of flesh in the revealing gown, which featured a keyhole split, showing off her cleavage, and thigh-high splits on either side.
The singer completed her look with black heels and a dark blue snakeskin-effect clutch bag, which she teamed with diamond drop earrings.
Sarah certainly didn't go unnoticed at the glitzy event and flashed her legs for photographers outside the venue!
The 32-year-old, who sported sleek blonde locks, was also joined by the likes of former Pussycat Doll Kimberly Wyatt and EastEnders star Shona McGarty.
The awards bash was held to celebrate brave animals and award those who have shown outstanding commitment to improve the life of animals.
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