The 23-year-old model was not shy about flashing her figure in the revealing black mini dress.
She was attending the I Saw It First party at celeb-haunt Sushi Samba in Central London.
Also in attendance were Love Island's Kem Cetinay and Survival Of The Fittest star Georgie Clarke.
But Birmingham-born stunner Demi wore the most eye-catching outfit as she turned heads with her chesty dress.
She paired the little black number with dark heels and a black leather handbag.
But Demi decided it was a bit too cold at the end of the bash to step out in just her dress.
She thought it best to slip on a cosy woollen coat over her stunning figure.
But she risked giving onlookers a little too much as she stepped tentatively into the back of a waiting car.
Demi was careful as she delicately threaded her lengthy pins into the luxury motor.
The model recently told The Sun Online that she plans to move to the US to pursue a career in acting.
She told us: "The plan is to move to Los Angeles as soon as I can get a working visa.
"I can't be sure I am going to make it but I want to try my best."
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