This is what 91 looks like.
(Reference, in case by chance you hadn't already heard of it, to her famous "This is what 40 looks like" 51 years ago, responding to a journalist who said she didn't look 40.)
She actually does look 91, though IMO not necessarily on the brink of death any more than anyone who is 91 is on the brink of death.
Theoretically, she could live another 30 years and still be younger than the oldest living human on record, who was 122.
I'm more shocked by Diane von Furstenberg, with the giant portrait of herself.