The 22-year-old model ensured all eyes were on her eye-catching cleavage as she opted for a daring cross-back plunging dress.

The British-born model's outfit also consisted of a high-thigh split, ensuring her toned legs were also on show.

Demi wore her brunette hair in a top knot bun with a middle-parting, styling two strands of hair either side.

She also opted for a contoured make-up look consisting of a nude-coloured lipstick and gold eyeshadow.

Demi completed look with a pair of silver heels as she crossed paths with the likes of Amanda Holden, Lauren Goodger and Megan McKenna at the annual event. 

Demi's revealing outfit comes as one of her many controversial choices, with her recently seen wearing a Greek-goddess inspired dress which had the majority of her chest on show and the material just about covering her nipples.

The model also showcased her enviable hour-glass figure in a recent Instagram post during a photoshoot in Santa Eulalia Del Río in Spain.

Demi treated her 5.8 million followers to a glimpse of her tanned figure as she wore a grey and black lace bikini with the caption: "Summer lovin" (sic)

Aside from her eye-grabbing outfits, the underwear model, who rose fame on the photo sharing site, made headlines last year for dating rapper Tyga, 27, while he was on a break with his now ex-girlfriend Kylie Jenner.

The pair were first captured shopping in Cannes at Saint Laurent.

The busty model recently told the Daily Mail online that she was no longer dating the music artist, but claimed she’s still in contact with him.