Icons of youth and beauty are not supposed to grow old, let alone grow old gracefully. They are supposed to live fast and die young, or else rage against the dying of the light with fidelity issues and plastic surgery. So it is against the odds, really, that Twiggy turns 60 today still beautiful (even if the saucer eyes are now edged by fine lines rather than by the three pairs of false eyelashes she wore when she was the Face of 1966), still a working model, and with little outward sign of the squeamishness......