FASHIONWhat Lies Beneath?For some of the world’s best-dressed women, the answer is nothing. We get to the bottom of the underwear-free trend.by Vanessa Lawrence10.17.131Jane Birkin’s sheer nerve, 1969.Photo: Getty ImagesRead the full story here.2Kate Moss at her 19th-birthday party, New York, 1993. Photo by Weiss/Conde Nast.Read the full story here.3Cara Delevingne hanging out in Burberry Prorsum, in May. Photo by Getty Images.Read the full story here.4Jenna Lyons takes the plunge, 2012.Read the full story here.5Anne Hathaway’s Pointy Prada, in February. Photo by Getty Images.Read the full story here.6Rosie Huntington-Whiteley’s side boob in Gucci, 2012.Read the full story here.7Gwyneth Paltrow’s big reveal, in April. Photo by Getty Images.Read the full story here.