Sold! Most expensive star smooches Desperate to beat fellow celebrity philanthropist Jeremy Piven's haul of $280,000 during a 2009 cha...

Sold! Most expensive star smooches

Desperate to beat fellow celebrity philanthropist Jeremy Piven's haul of $280,000 during a 2009 charity auction for a children's nonprofit, Theron threw in a last-minute offer of a seven-second liplock.

The actor puckered up in the name of AIDS research when a young woman offered up a whopping $350,000 for a kiss from the salt-and-pepper hunk during a 2007 charity auction.

When a woman offered $40,000 to pay for Thanksgiving dinners for the homeless at a 2003 Hollywood charity event, the Basic Instinct star upped the ante by offering her lip service if the bid went up to a cool $50,000. For her money's worth, Stone offered the lucky lady a lengthy, and by all accounts passionate, kiss.

The Desperate Housewife taught the audience just how sexy the finance industry can be when she raised $35,000 for a 2009 global-microfinance fund-raiser in Miami. There were no reports on how the pricey smooch affected world markets.

Twilight star Robert Pattinson sold off not one but two kisses at $20,000 a pop during a 2009 charity auction for AIDS research in Cannes, France. But if the winners were expecting to play the role of Bella in the franchise's steamier scenes, they were disappointed – Pattinson (pictured with movie mogul Harvey Weinstein) offered only chaste kisses on the cheek.

While raising money for GLAAD at the LGBT-rights group's media awards on March 24 in New York City, John Stamos and Glee costars Cory Monteith and Naya Rivera all smooched for a good cause – at $5,000 apiece – in a simultaneous three-couple liplock.

Supermodel Moss earned some cold hard cash for a London children's hospital in 2009 by auctioning off a kiss – while she wore a police uniform. After the smooch, the winner later remarked that Moss "tastes as good as she looks." No harassing the officer, sir!

Charlize Theron, George Clooney, Robert Pattinson and more are offering up their lips for charity. Find out how much their kisses cost!