Australian singer Kylie Minogue was the guest of honour at SIR Elton John's annual White Tie And Tiara Ball in Windsor, England, last night (29JUN06). The SPINNING AROUND singer looked dazzling in a silver and black dress as she reunited with her celebrity pals, including Scissor Sisters frontman JAKE SHEARS and fellow Aussie Natalie Imbruglia, for the first time since she was diagnosed with breast cancer last year (05). A party guest says ,"Elton has been very supportive and very concerned throughout her illness and was adamant that if she was feeling up to it - which she very much is - she should be invited to the party." Simon Cowell, Rod Stewart, Elle Macpherson, Ozzy Osbourne, Elizabeth Hurley, James Blunt and Petra Nemcova were among the guests at the Indian-themed party at John and his partner David Furnish's Windsor home. The money raised from the ball goes to John's Aids Foundation.