The Step Up actress opted for head-to-toe white at the star studded bash that drew in the likes of Caitlyn Jenner, Lady Gaga and Jennifer Lawrence and she took everyone's breath away in the stunning pillar number.
Cosmopolitan cover star Jessica looked ethereal as she covered up her enviable frame in the floor-sweeping frock that boasted an eye-wateringly high split down the centre, (oo-er!) a v-shaped neckline and pretty floaty sleeves to boot.
The star took the retro-glam look to the next level and accessorised with a chunky gilt necklace, a matching boxy clutch bag and a wide belt with a classic circle buckle. Just gorgeous!
When it came to her hair, Jess ditched the halo braids that are sweeping Beverly Hills at the moment (Kim Kardashian, we're looking at you) for voluminous tousles which were brushed to one side.
Jessica looked sensationally sophisticated but ramped up the sass factor with a sultry bronze eye, smokey enough to rival fellow guest Lady Gaga.
We're finding it hard to tear our eyes away!
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