George Michael, looking more like Vegas showman Roy Horn with each passing lens, says he’s on to be a guest at next week’s wedding between Elton John and David Furnish. Apparently, the two divas have settled a long-running dispute just in time to go shopping for wedding gifts for one another: John’s getting married on Dec. 21, the first day that Great Britain is recognizing same-sex couples by law, at a ceremony in Windsor – the place named for the current Queen. Michael thinks he and Texan partner Kenny Goss will do the deed themselves next summer on their tenth anniversary. Michael is on a global tour promoting his documentary, “George Michael: A Different Story,” which fills in the details on the years from Wham! to indecent exposure as nicely as Michael filled in his jeans in the “Faith” video (or, reports say, his butt-double did). Say, anyone know where to get a diamond-encrusted toaster?