A letter written by Frank Sinatra criticising fellow singer George Michael's opposition to fame is to be sold at auction. The original copy of an open letter to the pop star - first published by a Los Angeles newspaper in September 1990 - will go under the hammer in L.A. next Sunday (09Dec07) and is expected to make $600 (GBP300). He wrote: "Come on George, loosen up. Swing, man, dust off those gossamer wings and fly to the moon of your choice. "The tragedy of fame is when no one shows up and you're singing to the cleaning lady."