The singer was performing at Madison Square Gardens on New Year's Eve and told the crowd: 'They say I'm a diva, so might as well act like one.'
Mariah, who turns 40 this year, changed into sparkling outfits including a floor-length, low-cut silver gown, a tight red mini dress and a strapless white dress encrusted with gems.
Outfit one: Mariah Carey takes to the stage in stunning silver at Madison Square Gardens in New York on New Year's Eve
During the evening she poked fun at herself and, according to Rolling Stone magazine, told the crowd, 'I need some lipstick real quick and my hair fluffed.'
She performed tracks from her back catalogue and stopped a song mid-way to count down the new year with blasts of confetti, streamers and balloons.
After attempting to sing Auld Lang Syne, her husband Nick Cannon joined her on stage for her first kiss of the new year.
He was there at the side of the stage to see her performance, which end with a rousing performance of Hero.
She left the stage on the arm of Nick after wishing everyone a happy 2010 and shouting 'I love you all!'
New Year: Mariah stopped her song to give the countdown
