Mariah Carey supposedly spent £70,000 on a one-way ticket.

The 44-year-old singer has an estimated net worth of £297 million, and she reportedly splashed a fat stack of cash on a flight to France for the Cannes Film Festival next month.

Mariah apparently rented out an entire first-class cabin on a British Airways flight because she doesn't want to be disturbed by fans as she flies from New York to Europe for eight hours.

'Over the years Mariah has grown accustomed to travelling in ultimate style so she doesn't think twice about paying such a crazy amount to ensure her privacy,' a source told British newspaper The Sun.

Apparently the gorgeous diva is planning on relaxing while she's in the air.

It is claimed Mariah will be pampering herself throughout the flight.

'At least she'll be able to stock up on the missing passengers' complimentary eye masks and hot towels,' the insider said.

'Let's hope she doesn't demand that British Airways lays out fluffy carpets for her, kits out the upper deck with puppies and paints the interiors cream. To be honest, it would be cheaper for Mariah to just hire her own private jet.'

The songstress has been active in the music business since 1988.

Mariah has confessed to throwing diva strops before, but she says this was done so she could establish professional autonomy.

"I never had a mental breakdown, I had a diva fit and it was [because] no one wanted to let me have a say. When you start so young in the industry people are used to controlling you and then they realise, 'Oh this person has an opinion... OK it's different now,'" she said of the early nature of her career while conducting an interview on New York's Power 105.1 The Breakfast Club show.