Olivia Newton-John poses during an interview in Nashville, Tenn., in this May 15, 1998 photo. John and other singers from down under will perform next month at the opening ceremony of the 2000 Olympics. The singer and star of the hit movie ``Grease'' will perform with John Farnham, who gained international fame in the 1960s with pop hit "Sadie the Cleaning Lady", in addition to several other Aussie singers. (AP Photo/Mark Humphrey)