And she gave us a little glimpse of her barely-there bra in the process - oo-er!
The reality star - who was joined by Love Island's Tina Stinnes and Prince Harry's former flame Cressida Bonas at the bash - ditched the bodycon frocks (we know, gasp!) and poured her sensational figure into a pair of skin-tight indigo jeans that accentuated her wasp waist.
Cally oozed laid-back vibes and teamed her jeans with a super-slouchy grey top that left little to the imagination when it slipped down to reveal her racy lacy triangle bra.
Wardrobe malfunction or not, Cally looked smoking hot in the ensemble and she took to Instagram to hint that she had teamed the look with a pair of suede black midi boots from her upcoming collection.
Just last month, stunning Cally announced that she will be following in the footsteps (sorry not sorry) of former TOWIE star Jessica Wright to launch a debut shoe haul, which she revealed will include a whole hoard of party heels as well as everyday boots.
Taking to Instagram, Cally lifted the lid on the launch date (27 September, for all the shoe-obsessives out there) and shared a sneak peek snap of what we can expect.
Our verdict? ADORE.
She can do no wrong, right?
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