A mystery guest at SIR Elton John's White Tie And Tiara Ball paid $900,000 (GBP500,000) for a love song written by the rocker and composer SIR Tim Rice. The prize was just one of several starstudded lots auctioned at the bash - with all proceeds going to Sir Elton's Aids Foundation charity. The mystery bidder - rumoured to be Denise Rich, a friend of former President Bill Clinton - will have the song adapted to include a name of their choice. But it must never be released. Other lots included a chance to enjoy a curry and a movie at home with Sir Elton and a Bentley Continental GTC. Elton started the auction by saying, "Come on, guys put your hands in your pockets. Lets have some fun with this. Don't be shy. These are prizes of the century. Bet you can't wait to get your mitts on them!"