The former X Factor contestant showed us exactly why she's one of our biggest style crushes as she flaunted her flawless pins in the very Clueless-inspired tartan number while rubbing shoulders with Zoe Hardman, Ashley James and Lilah Parsons at the star studded get-together.
Diana let her jazzy skirt do all of the dazzling and made like Keeping up with The Kardashians star and catwalk-queen Kendall Jenner with a simple yet well thought out cream roll neck sweater which offset her lengthy blonde locks perfectly.
She ditched the fussy jewellery and ascertained that less really is more as she accessorised her punky ensemble with a pair of black suede ankle boots.
The stunner turned model herself after sharing a few behind the scenes snaps from the event at The Chiltern Firehouse on her Instagram. She pulled a few sultry poses at the trendy celebrity hotspot before joining her equally stylish pals for a spot of dinner and a few glasses of champers.
It's true - we can't get enough of her.
Steal Diana's style with this bargain of a tartan look-a-like from New Look but be sure to go bare legged for an edgy, street-chic feel.
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