Olivia Newton-John remembered by John Travolta, Richard Marx and more celebrity friends: 'My dearest Olivia'
John Travolta and other celebrities paid tribute to “Grease” star Olivia Newton-John after her death was announced Monday. “My dearest Olivia, you made all of our lives so much better,” Travolta wrote on Instagram alongside a photo of the actress. “Your impact was incredible. I love you so much. We will see you down the…