Taking London's Banqueting House by storm, the singer ramped up the sex-factor in the unique, all-black number by Self Portrait which boasted criss-cross detail on the chest, crochet sleeves and a rather risqué bandeau bralet.
Of course, Frankie pulled it all off like a pro.
The star ditched fussy jewellery for a simple black satin scarf which she doubled up as a 90s inspired choker and offset her gothic look with lashings of charcoal grey eyeshadow and a wedge of jet-black eyeliner.
Forget MIC's Louise Thompson and her stunning new 'do - it was Frankie that gave us major hair envy during the night with her impossibly glossy lob (long bob in case you were wondering), which glinted under the camera flashes.
As not to disrupt the Kim Kardashian-esque, monotone vibe Frankie sported a pair of suede black courts with multiple straps that lent her look an even sassier edge.
The brunette beauty who made the most of her seriously enviable curves mingled with the likes of Katie Piper, Tulisa Contostavlos and Boy George at the glitzy city event.
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