Hotel heiress Paris Hilton is ditching her night club parties for a glamorous appointment at the Vienna Opera Ball next month (15FEB07). The 25-year-old has been invited to the traditional event as the guest of Viennese socialite Richard Lugner, 74, and has reportedly been paid a staggering $1 million (GBP510,000) for the appearance. Lugner's wife CHRISTINA told a press conference, "She is a very good advertisement for the Opera Ball." The real estate mogul's previous celebrity dates have included Faye Dunaway, Sophia Loren and, last year (06), Baywatch beauty Carmen Electra.