Petra Ecclestone

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If you thought Kim Kardashian and Kris Humphrieswedding was extravagant, wait until you get a load of this one!

Croatian English heiress and socialite, Petra Ecclestone, who recently dropped $85 million (!) on Candy Spelling's mansion, swapped vows Saturday with businessman James Stunt in a lavish three-day affair right outside of Rome, according to People.

The 22-year-old daughter of billionaire Formula 1 racing CEO Bernie Ecclestone said I-do to Stunt at the castle where Tom Cruise and Katie Holmes tied the knot in 2006 (Castello Orsini-Odescalchi), with the bride reportedly walking down the aisle in a custom $130,000 Vera Wang gown.

And then there was the reception, where Andrea Bocelli, Eric Clapton and the Black Eyed Peas put on a show for guests like Paris and Nicky Hilton Rothschild, Princesses Beatrice and Eugenie and Sarah Ferguson as they sipped Chateau Petrus wine (which retails for $6,500 a bottle).

A source tells E! that after the Black Eyed Peas performed, Fergie pulled bride Petra, Paris and Nicky Hilton up on stage to dance. After that, David Guetta deejayed for two hours, and the Hilton girls were reportedly loving all the attention from the billionaire dudes in attendance. 

"No one had ever seen anything like it. Everything was done to perfection with no expense spared," a source gushed to E! Online. "It was the wedding of the century fit for a princess!"

Prior to the big day, guests were treated to a pre-wedding dinner at uber-posh hotel Villa Aurelia, where they dined on caviar, calamari, spinach ravioli and lamb chops, sipped Cristal champagne and enjoyed a performance by Alicia Keys, according to the Daily Mirror.

"It was the most fantastic setting," a party attendee told the Mirror. "Our menus were customized mirrors with our names etched into them. It was easily the most ­decadent pre-wedding dinner any of us had been to. Then Alicia came on and sang all of her hits. She began with 'Empire State of Mind' and everybody was singing along. We couldn't believe it–it was magical."

So, what was the price tag for this over-the-top affair?

More than $5 million, according to TMZ.

Not too shabby for a billionaire daughter's big day. 

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