The superstar songstress uploaded a photo of her stood in between her mother and beaming for the camera while holding her two-year-old toddler in her arms.
Mariah, 43, dressed to impress for the special occasion with her mum by wearing a gorgeous red frock, which she teamed with a pair of blinging silver earrings and flawless make-up.
Meanwhile, 76-year-old Patricia looked just as chic in a black ensemble with similar diamond earrings to her pop star daughter.
And it seems little Monroe has picked up the Carey family's style, as she wore a pretty pink dress with matching pink bows in her hair and her trademark pink glasses.
Mariah - who announced last month that she will not be returning as a judge to American Idol - captioned her three generations photo: "So much love.. with my mommy and my daughter".
The night appeared to be a female affair, since Mariah's hubby, Nick Cannon, and the couple's two-year-old son, Moroccan, were absent from the picture.
Recently, Mariah expanded her brood with a three adorable little puppies, after her pet pooch, Squeak E Beans, unexpectedly gave birth to a litter last month.
Monroe and Moroccan quickly took to the new puppies and started playing and posing for pictures with the tiny pets before Mariah had a chance to pick out their names!
What do you think of Mariah's glamorous family snap? Let us know in the comment box below, as the best comment from across the website each week wins £50!
Ex-TOWIE star Georgina Dorsett gives birth to daughter Nevaeh
Russell Brand: "Katy Perry is a lovely beautiful person"