Popsugar Fashion Oscars Sexiest Dresses at Oscars 2015 25 Looks From Last Year's Oscars That Practically Reinvented the Word Sexy February 26, 2016 by Aemilia Madden View On One Page Photo 25 of 25 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 25 Lady Gaga Lady Gaga made a statement in a sheer black dress with a full train at the Vanity Fair party. Previous Next Start Slideshow Red CarpetAll AnglesAward SeasonOscars