Well this is…different.
The popstar spent much of the night welded to Cara Delevingne's side, looking like a naughty prima ballerina in a two-toned DKNY dress with flared tulle hem.
And those buckled gladiator knee-high sandals are like a kinky version of lace-up pointe shoes or something.
All she needed was a whip and she'd have guys twirling on command!
[Image via Lia Toby/WENN.]