Popsugar Entertainment Halloween Pop Culture Halloween Costumes 2015 This Year's Hottest Pop-Culture-Inspired Costumes October 28, 2015 by Shannon Vestal Robson View On One Page Photo 12 of 68 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 12 Ava From Ex Machina What to wear: A bald cap you paint silver and a gray and silver bodysuit. How to act: A little robotic, of course, but sensitive and curious about the world. Previous Next Start Slideshow HalloweenHalloween CostumesTVMovies