#18 Olivia Newton-John
We need to sum up Olivia Newton-John in a few words, but how? The British-Australian dame was a one-of-a-kind pop icon who will be forever recognized for her role as Sandy in the movie adaptation of Grease, in which she co-starred with John Travolta. She was an activist for human rights, animal rights, and environmental rights, in addition to being a talented singer with a long and successful musical career.
The irreplaceable Newton-John passed away at the young age of 73 after a valiant fight against breast cancer. Her friends and fans will miss her terribly and always hold her in their hearts.