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Overexposure is a real danger, especially in an era when models who pose for the covers of fashion magazines are the subjects of celebrity profiles in the same publications only months later-and a Vogue story on Bridget Hall last summer could reveal the startling fact that she is a girl who enjoys canned chili. Supermodels might take a cue from the legions of male models, who remain largely anonymous. Quaint anachronisms, all they do is amble down runways. --With reporting by Georgia Harbison and Belinda Luscombe/ New York