After 25 Years, Twiggy's Back With Olay Long gone are days when models became washed up before their 30th birthdays. Take "the big six" of the '90s, for instance, whose varied careers have withstood the test of time. Also take note of Twiggy, the waifish model who became the face of the '60s while still in her teenage years. And now, the iconic model, who turns 60 in a few short months, is back in action.