We don't know whether to shiver or applaud her for getting her pins out. Brrrr!
Proving that she can pull off pretty much anything, the reality star turned fashion designer - who also has her very own shoe collection - looked a million dollars as she championed the underwear as outerwear trend and paraded her fabulous figure in a metallic gold slip dress complete with spaghetti straps.
The star dialled up the glam-factor with a matching gold choker and strappy sandals that drew attention to her gorgeous glow.
As always, Jess' locks were style to perfection and she swapped the chic up-dos for a whole head of cascading waves to compliment her natural nude pout and signature smokey eye.
Even though it was extremely frosty outside, the stunner had no qualms about posing on the rooftop of a swanky Central London hotel before letting a dozen golden balloons go.
Such a babe, right?
Talking of famous faces, Jess isn't the only celeb to front the Manuka Doctor campaign, as Keeping Up With The Kardashians star Kourtney Kardashian was announced as an ambassador earlier this year.
She revealed that she revitalises tired eyes with a few drops of the Replenishing Facial Oil, £19.99 before bed.
Well, if it's good enough for the stars...!
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