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Not feeling blue! Mariah Carey radiated at the UNICEF Ball in Beverly Hills, California on Tuesday

The floor-length blue and black number perfectly matched the arrivals carpet – which had been changed from red to blue for the charitable event at the Beverly Wilshire Four Seasons Hotel.

Her perfectly applied make-up highlighted her pretty features as she showed off her slimline physique.

The beauty straightened her often-curly golden locks to fall in a central-parting around her shoulders.

Elegant: The 45-year-old singing superstar put on a eye-popping display of her assets, in the low-cut leather strappy bralet top to her gown

She sported a golden tan – following a festive period in the Australian sunshine with her children and billionaire boyfriend James Packer.

Accessorizing with diamond earrings and a bling necklace and bracelet, the All I Want for Christmas star was without her 48-year-old partner – just two days after sharing a loved-up image of the pair posing by a firework lit lake.

Her ex-husband Nick Cannon took the opportunity of Mariah being in Los Angeles to spend some time with their children.

Golden girl: The beauty straightened her often-curly golden locks to fall in a central-parting around her shoulders

Diva: The floor-length blue and black number perfectly matched the arrivals carpet – which had been changed from red to blue for the charitable event at the Beverly Wilshire Four Seasons Hotel

He took son Moroccan Scott and daughter Monroe to Disneyland for the day, after they returned from Ponde Beach in Australia.

Meanwhile Mariah is set to perform to the celeb-packed audience at the charity event.

David Beckham is being honoured with the charity’s Humanitarian Leadership Award during the ceremony, for his work helping children through his Seven Foundation.