The reality star looked absolutely gorgeous as she slipped her incredible gym-honed bod into this eye-wateringly teeny tiny white bodycon frock that boasted a simple bandeau neckline and a thigh-skimming hem.
Even though her insane abs were under wraps, we have to take a moment to marvel over that wasp waist. Er, wowza!
The starlet dialled up the fierce factor and laced her feet into a pair of nude sandals and she stood tall next to Strictly pal Ola Jordan as the pair posed for the paparazzi.
As always, Jess' trailing tresses were totally seamless and she looked to her debut clip ins collection with X Factor Hair Extensions for the extra length.
Unlike other celeb collaborations, Jess re-wrote the beauty rulebook by throwing a whole hoard of super-curly and perfectly-tousled hair pieces into the mix and it looks like she's seriously proud of the results.
The stunner - who will star in the next series of Ex On The Beach alongside Geordie Shore's Gary Beadle and Jemma Lucy to name but a few of our favourites, kept her make-up simple. A Kylie Jenner-inspired nude lip and lashings of mascara was all she needed to make a splash.
At the bash which saw Love Island's Zara unveil a whole hoard of wardrobe staples for online fashion hub Miiaan (Danielle Armstrong is set to follow in her footsteps later this year, too!), Jess rubbed shoulders with TOWIE's Nicole Bass and hunky Calum Best, but there's no denying she garnered the most attention.
Girl crush alert, girl crush alert!