The chart-topping icon has been confirmed as the first major star set to perform at the opening ceremony of the Games, which is being staged at the San Siro stadium in Milan on February 6.
In a video message to announce the news, Carey said: "Ciao. Get ready for Milano Cortina 2026. See you at the Stadium San Siro on the sixth of February for the Olympic opening ceremony. See you in Milan!"
The local organising committee has also announced Carey's appearance at the opening ceremony.
The committee said: "Mariah Carey fully represents the emotional atmosphere that accompanies the run-up to the Games.
"Music is a universal language that attracts different stories and sensibilities, and intertwines with the opening ceremony's theme of harmony."
Carey has enjoyed a hugely successful in the music industry, becoming one of the best-selling artists ever - but the pop star previously admitted that she does not know the public's perception of her.
She told Variety: "If people have a good sense of humour, they'll just be like, Oh, we kind of get her. She's campy, she's this, she's that, she's not always serious. I don't know what people think of me.Â
"I had this conversation with Ellen (DeGeneres) and I was like, 'I don't know what the biggest misconception about me is because I don't know what people think.' I don't know."
Mariah also suggested that she has a public persona that's distinct from her real-life self.
The 56-year-old singer said: "I really play it up with the diamonds and the hair and the make-up and the this-and-the-that and the shoes and the whole ensemble, but honestly, is that me? I don't really know. Yeah, part of it is me. I mean, would I be mad if someone gave me a new diamond bracelet? No. But that doesn't mean that's all I care about."
17°C