The Nasty hitmater unleashed her inner vixen at the star-studded city bash and poured her stunning, slender figure into this show-stopper of a crimson frock by Issa London which featured a ribbed skirt, a Spanish-style concertina hem and a plunging neckline that gave us a cheeky glimpse of her chest!
The dreamy, floaty sleeves and Kim Kardashian-inspired choker neck detail were the icing on the cake of her eye-popping ensemble and a rhinestone encrusted poppy brooch was all the Brit songstress needed to stand out from the crowd.
Pixie who was still rocking a slight pink tinge to her locks gave us some major beauty inspiration with her dishevelled and messy yet seriously cool ponytail which boasted oodles of volume at the crown.
We're awarding top marks to hair-styling maestro Holly Rudge for this masterpiece and you can nab the look with our 5-step How-To right here.
Oh, we're too good to you.
After taking to the makeshift stage for a stellar performance, Pixie rubbed shoulders with former Made in Chelsea star Millie Mackintosh and Glamour cover star Tanya Burr at the charity event which took place at London's world-famous Victoria & Albert Museum.
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