LAS VEGAS, NV - AUGUST 09: Singer/actress Olivia Newton-John and her daughter, singer Chloe Lattanzi (not pictured), celebrate the 35th anniversary of "Xanadu" with the world premiere of their music video "You Have to Believe" at Share Nightclub on August 9, 2015 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/Getty Images)
