The actress stepped out at the premiere of Black Nativity - released on 6 December - last night (18 November), held at the Apollo Theater in New York.
Jennifer - who famously lost an incredible 80lbs since 2010 - strutted her stuff in her slinky number, which featured mesh sleeves, a plunging neckline and a saucy thigh split.
But while we love Jen's glamorous frock, we couldn't help noticing her nude bra straps peeking out from underneath! Surely a strapless bra would have been a much better option?
Nonetheless the starlet still rocked the red carpet, sporting a fierce quiff, vibrant nails and pretty floral courts.
She even upped the va-va-voom with her beauty look, showcasing deep berry lips and smoky eyes.
The yummy mummy flashed a beaming smile as she posed for the cameras, which is hardly surprising seeing as she's had a pretty good week!
On Wednesday (13 November) Jennifer was honoured with her very own star on The Hollywood Walk of Fame - the first ever American Idol contestant to earn a place on the infamous sidewalk.
The Dreamgirls star attended the ceremony with her partner David Otunga and her little boy David Otunga Jr., who looked incredibly proud of his mum. Awww!
What do you think of Jennifer's dress? Let us know by commenting below as the best comment across the site each week wins £50!
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