Diva Mariah Carey arrives with 20 suitcases ahead of X Factor performance... well, she is staying three nights

Mariah Carey lived up to her diva reputation as she arrived in London for a three-night stay today... accompanied by 20 suitcases.

The singer and her husband Nick Cannon needed two huge trolleys to carry their bags. Porters pushing them through Heathrow airport seemed bemused by their haul.

When the newlyweds arrived at the Dorchester they were met by a crush of Mariah's fans, who held up banners saying 'Congrats MC and Nick'.

Mariah, who is 11 years older than her 27-year-old actor husband, dressed for comfort in grey leggings and open toe boots.

The 38-year-old kept warm with a long black cardigan, while Cannon dressed smartly in a pinstripe suit.

This week on the X Factor all the contestants will be performing a Mariah ballad - with the soul singer on hand to instruct them.

There are are plenty to choose from - with a career spanning 18 years, Mariah was named the best selling female artist of millennium in 2000 and has had more US number one hits than any other female in history.

The hopefuls have already covered one of Mariah's songs, Hero, currently at Number One in the British charts.

The track is raising funds for the Help For Heroes campaign and looks set to be one of the biggest selling British records of all time.

On Saturday night Mariah will join the remaining finalists on stage in a special performance of the track, as well as performing her latest single I Stay In Love.

Her X Factor debut comes after Simon Cowell personally stepped in to request her.
Mariah has also been tipped as a possibility to replace X Factor judge Dannii Minogue at the end of the series, when the singer is widely tipped to leave the show.

Following her X Factor performance Mariah and her husband will be flying to Monaco for the World Music Awards.

The couple, who originally met at the Kids' Choice Awards in 2005, married at her private estate in the Bahamas in April after a whirlwind six week romance.

They fell for each other when Cannon flew to Antigua at the end of March to play Mariah's love interest in the video for her single Bye Bye.