The former Radio 1 DJ proved her style credentials and then some as she unleashed her inner 70s chick in this plunging black jumpsuit that boasted fierce flares, shoulder-pads and silk lapels but we couldn't stop our eyes from travelling upwards.
Earlier this week, Fearne rocked the coolest fishtail braid (and you can copy the look here, FYI) but she swapped festival chic for high glamour at the star studded celebrity bash and we have a major case of hair envy going on!
Fearne - who usually rocks her platinum blonde tresses in a super-sleek, straight style - went all out with tousles and a whole 'loada volume and we almost didn't recognise her as she sauntered past guests including DJ Sarah-Jane Crawford and Gok Wan's BFF, Brix Smith Start.
Now that's what we call a gravity defying 'do.
Fearne absolutely loved her out-there barnet on the night, but backcombing and hairspray abuse left her less than impressed when she woke up this morning.
The mum-of-one took to Instagram to give us a glimpse of her wild mane having slept on it for a solid eight hours and she gave us a good laugh in the process!
Fearne pulled a distressed face and captioned her snap, "Last nights hair today. It's taking over," and fans and followers were quick to liken her to a very famous actress...
"You look like Bellatrix Lestrange!" wrote one, while another said, "Channeling your inner Helena Bonham Carter here."
Stick some dry shampoo in there and it's good for another few days, Fearne!
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