The famously image-conscious star used to despise exercising, but has become a fan of Pilates since moving to America.
She is quoted by Britain's The Sun newspaper as saying: "I've done Pilates four times and I'm going to get more into it. I absolutely hate sportswear and I hate flat shoes.
"For Pilates, you can wear socks and you don't sweat. I'm not big on that either."