She's the former editor of Vogue Paris with a penchant for lace-up leggings and kohl-rimmed eyes but Carine Roitfeld's mantra for staying youthful is surprisingly less rock-chick and more simple than you might suspect: just hold yourself well. She says, "When you're getting old, obviously you try to put on the best cream, you have massages, you try to stay beautiful, but I think wrinkles can sometimes be more beautiful than having none. The most important thing is posture: when you get old, it's the way you walk, the way you stand, that shows it." So there you have it. Stand up straight s'il vous plaît. Do you agree with Carine? What's your best anti-ageing tip?