The Bronx-bred rapper, 29, posed with husband Offset, 30, and their two children – Kulture and Wave, ten months.
After teasing outtakes on Saturday night the music artist shared more precious moments from the celebration with her 138 million followers.
Family affair: Cardi B appeared on Instagram on Sunday to share sweet images from her daughter Kulture’s fourth birthday party
Leaning into the mermaid-theme, the entertainer donned a hot pink wig that was styled in an updo.
She dressed the part of sea siren as she wore a seashell-covered bra with netting over her midriff.
The Grammy-winning hitmaker paired the busty top with a long skirt with large, iridescent sequins that mimicked a mermaid tail.
Adding to the dreamy look, she walked in towering metallic pink platform heels.
Hot stuff! Leaning into the party’s mermaid theme, Cardi dressed the part of sea siren as she wore a seashell-covered bra with netting over her midriff
Kulture, a mini me of her boisterous mom, wore an age-appropriate similar look for her special day.
The little one wore her curly hair in a high ponytail with a purple fishtail braid extension.
In one photo shared to social media the youngster shared a kiss with her mom as her dad held her in his arm.
The rap star wrote in the caption of the slideshow, ‘I got your back, your front and sides…..BIG 4.’
Kulture showed her big personality in multiple snapshots in which she posed enthusiastically.
Adorable: After teasing outtakes on Saturday night the music artist shared more precious moments from the celebration with her 138 million followers
Precious: The rap star wrote in the caption of the slideshow, ‘I got your back, your front and sides…..BIG 4’
Joining in on the fun was Kulture’s younger brother, who wore diamond stud earrings and a white outfit.
He was happily perched in his rapper father’s arm in one photo, as the Migos member sported flashy jewelry.
Offset teamed his glinting chains and watch with a black Balenciaga sports jacket.
Taking to her Stories, the megastar share various snippets from inside her home as she partied with close friends after the party.
The boys: Ten-month-old Wave was happily perched in his rapper father’s arm in one photo, as the Migos member sported flashy jewelry
Cutie: Kulture showed her big personality in multiple snapshots in which she posed enthusiastically
The party comes days after Cardi and Offset gifted their firstborn child with $50,000 cash.
The Atlanta-bred artist posted a video of their little girl in the in the window of a black SUV while holding the generous gift.
‘What is that?’ Offset was heard saying as he filmed the interaction with his daughter, to which she replied, ‘A ticket!’
‘A ticket is a million, girl,’ he replied, adding, ‘That’s 50. Say, 50!’
The preschooler turned four on July 10, and the family celebrated with a trip to Candytopia – an interactive children’s museum.
Charmed life: The party comes days after Cardi and Offset gifted their firstborn child with $50,000 cash
Festive! The little one wore her curly hair in a high ponytail with a purple fishtail braid extensions