Stay-fit secrets of the stars

Kim Wilde, 47

Best known for... An illustrious '80s pop career that saw her top the UK and US charts with hits such as 'Kids in America' and 'You Keep Me Hangin' On'.

What's her healthy hobby? OK, so it's less of a hobby and more of a career - but Kim has now become a professional gardener. She spends as much time as possible indulging her passion in the great outdoors - and, of course, all that digging and weeding helps her muscles stay super-toned. An hour's gardening can burn around 450 calories.

Kim says: 'I was a bit starstruck when I met Alan Titchmarsh. I surprised myself. I was a bit tongue-tied.'