The 'Sin City' star revealed in the footage she had been challenged to the contest, and was "throwing it out to all the girls" before giggling and making faces into the camera.
This is Jessica's latest posting on the website, which was co-founded by her fiance Cash Warren.
She has also taken part in an 'Office lip-synching contest', which saw her mime to Panic At The Disco's track 'Nine in the Afternoon' as well as a 'Best you with a celebrity' picture competition that saw her post a picture of her and Sir Ben Kingsley.
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