LAS VEGAS, NV - AUGUST 09: Singer Chloe Lattanzi (L), and her mother, singer/actress Olivia Newton-John, 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)
