The famous sisters posed up a storm before heading into the event, where they were joined by supermodels Cara Delevingne and Jourdan Dunn, plus Beyoncé Knowles, who recently announced she'll be teaming up with Topshop to create a new sportswear brand.
Of course Paris and Nicky both took the opportunity to showcase their chic evening wardrobes, with Paris glamming things up in a sexy black dress.
Her frock featured a plunging neckline for heaps of va-va-voom, which was balanced out with a demure below-the-knee hemline with a mesh panel running across the bottom.
Adding a tough edge to her look, Paris wore fingerless leather gloves along with a long cardigan with cut-out lattice detailing, topping her sunkissed pins with patent Louboutins and leaving her golden locks sleek and straight.
Meanwhile, sister Nicky nailed effortless cool in a pair of skin-tight leather trousers paired with towering black boots which were covered in fierce silver studs.
The book author also rocked a sheer khaki green top with an animal print, wearing her black jacket in a shoulder robe style and adding a touch of bling with diamond earrings and a heart pendant necklace.
And we heart her little black Hermès Kelly handbag too - we want one!
What do you think of Paris and Nicky's outfits? Let us know by commenting below as the best comment across the site each week wins £50!
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Paris' year so far in pictures:
Copyright: Jean Catuffe / Contributor