With a career spanning more than four decades, Olivia Newton-John is one of the world's top entertainment stars, with international successes in the studio, on tour, on television and in films.  In March 2006, Newton-John performed her most popular hits and songs near and dear to her heart with the Sydney Symphony at the historic Sydney Opera House.      On January 15, 2008, Capitol/EMI, in conjunction with ONJ Productions, will release new CD and DVD titles featuring Olivia's performances from that landmark musical celebration of her illustrious career.