Mean Girls star Lindsay Lohan is said to have backed out of a date with an ageing Austrian tycoon who invited her to accompany him to Viennas lavish Opera Ball. Lohan,23,had been chosen to attend the annual gala with 77-year-old entrepreneur Richard Lugner,who has always had a sexy celebrity on his arm at the glitzy event,reports The Daily Express. The actress was set to follow in the footsteps of Paris Hilton,Geri Halliwell,Pamela Anderson,Andie MacDowell,Sophia Loren and Dita Von Teese,who have been Lugners date in previous years. According to the Austria Press Agency,Lohan refused Lugners invitation,and did not give any reason as to why she could not attend the party on February 11.