My Day on a Plate: Beverley Knight, singer 1pm On the tour bus, off to a festival. I scoff baby spinach, chicken and cucumber and carrot batons with hummus, and a builder's brew. Fruit for dessert. 6pm Eat as early as I can before my headline slot. It's all veggie backstage - I have an amazing lentil and butternut squash soup with rye bread. 9pm It's fantastic on stage. Strangely, I always crave salt afterwards. Compromise with nuts and tea, while everyone else swigs brandy. Beverley Knight joins the cast of "The Bodyguard" at the Adelphi Theatre, London WC2, from 9 September While singers might steer clear of dairy, they still need calcium for their bones. Beverley might want to try soya milk and yogurts, which tend to be fortified with calcium. She does very well on the fruit and veg front but could do with a little more carbohydrate to keep her energy levels up - oats, spelt, quinoa or couscous would all be great choices.