Sir Paul McCartney's wife died of breast cancer in 1998, and the fashion icon, a mum of four, is terrified she may face the same fate.
She tells Harper's Bazaar magazine, "It's really hard because you think, 'I've got to make sure I don't get cancer for the sake of my kids, and I'm going to make sure my sister doesn't get it for the sake of her kids'.
"I try to be really preventative and get regular check-ups. I'm not OK with death. But I'm a real believer in trying to live in the moment."
