It was a festive affair as Mariah showcased her powerhouse vocals to crowds at the 81st Annual Rockefeller Centre Christmas Tree Lighting event on Tuesday night (3 December).
Mariah, who is mum to twins Monroe and Moroccan, wowed the crowds in not one, but two dresses!
The superstar showed off her curves in a red figure-hugging gown, complete with a white furry shrug, diamond earrings and leather black gloves. Very festive!
As ever, note-perfect Mariah entertained fans and had a young choir and group of performers on stage dressed up as elves.
Always one to impress, Mariah later changed into a dazzling white encrusted floor-length fishtail gown, which she teamed with satin gloves.
Later, taking to Twitter, Mariah posted a snap of her white dress and said: "I know it's a lil over the top lol #rockefellercenter #Christmastreelight."
Meanwhile, it appears that Mariah's daughter Monroe might be following in her mother's famous footsteps!
Earlier this year, Mariah joked that Monroe was a "diva in training", and last night Mariah echoed the same thoughts in a cute Instagram photo.
The 43-year-old shared a snap of Monroe trying on one of her killer heels. Mariah, who posed alongside Monroe in satin pyjamas, said: "Miss Monroe woke from her slumber only to snatch mommy's new R.C.'s (Tré Chic) & prance around. Only 2 1/2, watch out."
Watch the music video for Mariah's 1994 Christmas hit, 'All I Want For Christmas Is You' below: