Gorgeous Mollie looked beyond stunning in a white dress by Dolce & Gabbana, which was covered in pretty black lace detailing.
The 'Disco Love' singer completed her sophisticated ensemble with pointed patent heels and a black chain bag, sweeping her locks into a loose chignon.
Judging by Mollie's Instagram feed she's been a busy bee recently, jetting back and forth between London and LA where her boyfriend, music producer Jordan Omley, lives.
In fact, the starlet posted a picture on herself in California just the day before, looking cool and casual while rocking a university baseball cap.
She added the caption: "Totally not a tourist with my UCLA hat on."
We're pretty impressed she made it out after her 10-hour flight.... no jet lag then, Mols?
Her bandmate Vanessa White also hit the style mark at the event, sporting a printed dress with black mesh detailing.
Despite getting caught in a downpour the brunette beauty still looked totally immaculate, flaunting voluminous locks and smouldering smoky eyes.
Before the bash, the twosome got ready together at the swanky five-star Westbury Hotel, with Vanessa tweeting: "Thank you so much @WestburyMayfair for looking after me and @MollieTheSats today! Our fav place to get ready! Xx"
It's alright for some, eh?
What do you think of Mollie and Vanessa's outfits? Let us know by commenting below as the best comment across the site each week wins £50!
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Watch The Saturdays' video for 'Disco Love' below: