Christina AguileraChristina AguileraIf you're planning your wedding and you've got a few million quid to spare, why not hire Christina Aguilera to perform some of her greatest hits for your guests?

That's what Russian billionaire businessman Andrey Melnichenko did - offering the Dirrty singer a whopping £1.2m to sing just two songs at his wedding bash in the South of France.

But apparently it was money well spent.

"Christina did a brilliant job," said one wedding guest. "There wasn't a dry eye in the house when she sang Beautiful."

"But no-one suspected how much she'd been paid - it's like winning the Lottery for her."

Not only did Christina pocket the huge payday, she was also treated like royalty.

She was flown to Cannes, where the wedding was held, in a private jet, and she and fiance Jordan Bratman were put up in a £2,000 a night suite at a swanky hotel.

But Christina wasn't the only one to take to the stage at the wedding - other famous faces singing for the happy couple included Enrique Iglesias and his dad Julio.

Songstress Whitney Houston also performed for Andrey and his bride, model Alexandra Koktovic.

And the guest list included the likes of Russian president Vladimir Putin and Chelsea owner Roman Abramovich.

"The do must have cost £20m," said one guest.

"It makes David and Victoria Beckham's wedding look like a register office job."