Mariah CareyMariah Carey has fuelled rumours of a romance with actor Nick Cannon after they were spotted partying together in Las Vegas on Monday night.

The pair are said to have started dating after Nick was invited to star opposite Mariah in a new music video but even though Mariah’s spokesperson denied the rumours last week, the pair were spotted looking close at PrivĂ© within the Planet Hollywood casino and bar.

After arriving in the Nevada city by private jet, the couple went to the venue to help rapper Da Brat celebrate her birthday and dined together before Nick took to the DJ booth.

An onlooker reports: “They were very close as they walked in together. She whispered something in his ear then they both giggled. It was cute.”