The New Year's Eve actress sizzled a black velvet gown complete with a racy plunging neckline as she stepped out at Tiffany & Co.'s debut of The 2014 Blue Book in New York last night (10 April).
Proving there's nothing better than a sexy black frock, Jessica - who is married to Justin Timberlake - looked beyond stunning in a floor-sweeping number by Oscar de la Renta.
She highlighted her tiny waist with a metallic belt while flaunting a sophisticated pair of pointed heels by Christian Louboutin.
And of course Jess accessorised with Tiffany jewels for the occasion, showcasing a mesmerising diamond necklace paired with matching sparkling earrings. We'd hate to think how much those babies cost...
The brunette beauty completed her look with an embellished clutch while flaunting a bright raspberry red manicure.
On the beauty front Jess kept things a bit more low-key, scooping her tumbling locks into an effortless messy updo.
Her make-up was pretty simple too with nothing but a slick of mascara adorning her lashes, which she teamed with a Barbie pink pout.
And believe it or not, we even spotted Jess taking time out from posing for the paps to take a quick selfie!
The starlet looked very happy as she pulled a huge mega-watt smile while holding an iPhone in front of her.
She's clearly a pro selfie-taker!
What do you think of Jessica's dress? Let us know by commenting below as the best comment across the site each week wins £50!
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