Since her 18th birthday, when Steven Meisel convinced her to shave off her eyebrows for a Vogue Italia cover in 1997, the model and musician Karen Elson has become more than used to presenting herself in daring looks for the public eye—and, of course, also pulling them off. She spent the '90s in sheer dresses that seemed to make her skin even more translucent while attending major events alongside designer dates like a mullet-bearing Jeremy Scott and a fan-carrying Karl Lagerfeld, the latter…