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Tom Cruise, Katie Holmes, Donald Trump, Melania Knauss

Robert Evans/ZUMAPress.com; Gregg DeGuire/WireImage

William Hearts Kate! Royal Romance

Prince William and Kate Middleton's upcoming wedding is sure to be one for the history—and check—books. But royals are not the only people who know how to glam it for the big day.

Whether its $800,000 or almost $80 million, money is no object when it comes to some superstars' big day. The average cost of an American wedding today hits around $30,000. For some of these lavish weddings, that's barely the price of the cake!

Just ask Katie Holmes and Tom Cruise who had their entire wedding party wear Armani while watching them say "I do" in Italy's 15th century Odescalchi Castle outside Rome. Or Elizabeth Taylor, whose wedding was held at Michael Jackson's Neverland Ranch—and the King of Pop served as father of the bride!

Too much? Too weird? You could just go for a much simpler wedding with Donald Trump and his model bride who treated guests to caviar and Cristal while Billy Joel and Tony Bennet entertained.

Now that we've got you drooling over wedding bling, take a look and see just how pricey and posh these star-studded weddings can get!