Prince William and Other Celebs Auction Hangout Sessions for CharityIf you've ever dreamed of partying with Usher, meeting the future King of England or taking a dip with Michael Phelps, here's your chance. Seventeen of PEOPLE's Sexiest Men Alive are offering up their time to the highest bidders in a charity auction on

But if you want to work out with Hugh Jackman as he prepares for the next 'X-Men' sequel, you better get ready to fork over some cash. While some of the auctions are more reasonable, if you're looking to bid on the higher-profile events, like meeting Prince William at a polo match, which 12 people have put in bids for, it'll cost you a pretty penny. The next minimum bid for Prince William is $9,250.

The unique auction packages include a New Year's Eve in Miami with Usher (estimated value: $3,150), a swimming class with Phelps (estimated value: $10,000) and having Ben Affleck record your voicemail (estimated value: $1,000).