Last week, I went for a walk with Prince William. I couldn’t help but giggle when he told me about how he used to sing at the top of his voice in the car to Tina Turner with his mother. A day earlier, I had strapped on my walking shoes for a date with Dolly Parton (she does her best thinking while walking), and before that, Goldie Hawn. I’m not the only one who has walked with them of course – anyone with an Apple Watch and a Fitness+ subscription can call on them for
