I take slight issue with the word ''celebrities" for the likes of Marilyn and Audrey Hepburn. Celebrities for me are people that are primarily well known for being well known, like the people who win X-factor, or who are the granddaughter of some rich industrialist.
Marilyn and Audrey were STARS. Properly famous for having immense amounts of talent. These were both fantastic actors.
Diana doesn't quite fit that or any other readily available category. I guess a tragic death comes into it ("only the good die young" and that kind of nonsense).
_________________
I have traveled extensively in Concord (Thoreau)