She is dating Australian billionaire James Packer, who has a majority stake in Crown.
The American singer responsible for hits Dreamlover and Hero will appear at the Palladium ballroom for 1,200 partygoers, as reported in the Herald Sun on Monday.
Carey said: “I can’t wait to get back to Australia, I have so many of my friends and fans there and the country really means so much to me.
“To be heading over for New Year’s Eve with James and to be able to put on a performance at Crown, it is incredibly exciting. Australia really will be the place to celebrate in the new year and I am counting down the days.”
Carey and Packer are currently at the US ski resort of Aspen – where they first met in 2014, although according to media reports they did not begin dating until June – celebrating Christmas with Carey’s four-year-old twins Monroe and Moroccan.
It is not the pair’s first Crown appearance. In October they walked the red carpet for the launch of Melco Crown’s $4bn Studio City casino in Macau.
Carey, 45, recently discussed with American chat show host Steve Harvey how she met the 48-year-old businessman. “We were at the Hercules premiere. We were talking and laughing, and people were getting mad at us and stuff like that. So we hit it off.”
Since January, Carey has been a resident performer at Caesars Palace in Las Vegas, in a show performing 18 of her US No 1 hits.
She recently made her directorial debut with a Christmas television film called A Christmas Melody, starring herself alongside Lacey Chabert.
This article was written by Monica Tan, for theguardian.com on Monday 21st December 2015 00.47 Europe/Londonguardian.co.uk © Guardian News and Media Limited 2010