Taking centre-stage, she gave a seductive look away from the camera as she placed her hand on her face.
The brunette beauty wore her hair in two high buns with part of her hair placed over her right cheek.
She completed her look with carefully contoured make-up consisting of a pink lipstick and dramatic eyelashes.
She captioned her picture: “I need a Mai Tai, so f****n’ sci-fi.”(sic)
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She wrote: “14 Milli !!!! Thank you so much for all your love and support over the years. I love you guys.”
Demi is no stranger to flashing her jaw-dropping figure on Instagram.
Earlier today, she also shared a selfie with her fans as she embraced the sun.
The model showcased her radiant skin while laying on a sun lounger, captioning the pic: “Tan pls.”(sic)