Which celebrity auctions brought in the biggest bucks in 2010?

Everything from Lady Gaga couture (unfortunately not the one and only meat dress) to a workout with Hugh Jackman to lunch with Rupert Murdoch hit the auction block to benefit great causes around the world this year.

They say you can judge a person by his or her fans. What if we choose to judge stars by how much their fans are willing to shell out for a great cause? We've judged people for a lot less.

In 2010, celebrities, actors, actresses, musicians, business moguls and politicians helped the online auctioneer Charitybuzz raise $25 million, no small feat during a year when charitable giving remained a tough sell in a struggling economy.

Yay for Charitybuzz! But enough of the accolades, who has the most altruistic fans?

Jay-Z took the prize for highest-grossing auction item on the site, beating out former Prez Bill Clinton, Sir Paul McCartney, Prince William and Robert Pattinson for the number one spot with his $220,000 signed, limited edition Audemars Piguet watch to benefit Broadway Cares/Equity Fights AIDS. Here's what else we learned: a date with Elton John is worth more than some facetime with Oprah Winfrey. And even though Prince William is royalty, being Robert Pattinson's lady-in-waiting is more profitable.

Lady Gaga and Justin Bieber didn't make the cut with a single auction item on the list of top auctions, but their continued generosity still made a big impact. Lady Gaga raised more than $125,000 total on Charitybuzz this year, while Bieber raised more than $67,000 by auctioning off tickets and meet-and-greets along his tour. Check out the full list of the top-grossing celebrity auction packages below.

Top 15 Celebrity Auctions of 2010

1. Win an Audemars Piguet Royal Oak Offshore Las Vegas Strip Tourbillon Limited Edition watch signed by Jay-Z, to benefit Broadway Cares — $220,000 
2. Meet Paul McCartney at the Apollo Theater with VIP Tickets, to benefit the GREEN Schools Initiative — $130,000
3. Meet Robert Pattinson on the set of Twilight: Breaking Dawn, to benefit the GO Campaign — $85,000
4. Have lunch with Rupert Murdoch, to benefit the Global Poverty Project — $85,000
5. Play golf with Tom Watson, to benefit The Pink Pony Fund — $80,500
6. Play golf with Bill Clinton, to benefit Christie's Green Auction — $80,000
7. Get a backstage tour from U2's The Edge, to benefit Gabrielle's Angel Foundation — $80,000
8. Meet Prince William at the Chakravarty Cup, to benefit the Chakravarty Cup — $71,250
9. Watch Barney's creative director Simon Doonan create the Barney's Christmas windows, to benefit Christie's Green Auction — $60,000
10. Be Sir Elton John's guest at his star-studded post-Oscars party, to benefit the Robert F. Kennedy Center for Justice & Human Rights — $52,000
11. Meet Ralph Lauren at New York Fashion Week, to benefit The Pink Pony Fund — $51,000
12. Have Shepard Fairey paint your portrait, to benefit the Robert F. Kennedy Center — $45,000
13. Intern for Anna Wintour at Vogue, to benefit the Robert F. Kennedy Center — $42,500
14. Meet James Cameron at a private viewing of Avatar, to benefit MUSE Elementary School — $42,500
15. Meet Oprah backstage at a taping of her show, to benefit the Robert F. Kennedy Center — $40,000