The mum-of-three – the couple also share five-year-old daughter Blue Ivy - were seen exiting Mack Sennett Studios in Los Angeles before heading to a Roc Nation party for rapper Vic Mensa last night.
Posting a picture of her date-night outfit to Instagram, the 35-year-old singer looked svelte in a pastel corset skirt with a cleavage-bearing bell-sleeved blouse.
And fans were quick to gush over her amazing body transformation.
“Dang! Looking way too good after twins! Amazing,’ ‘she literally gave birth ONE MONTH ago like wtf,’ ‘Question: How do you look like that after giving birth a month ago? Answers: It's Beyonce,’ were just some of the complimentary remarks.
Earlier on in the day, Beyonce introduced Sir Carter and Rumi to the world with an Instagram photo of her cradling the one-month-old boy and girl.
Wearing a pink floral robe and blue veil whilst standing in front of a beautiful floral arrangement, the photo appeared to have been taken in the grounds of her $400,000 a month Malibu rental.
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