Do you have your Halloween costume yet? We're here to show you how to pull off the five hottest pop culture costumes of the year! Find out how to copy Katniss Everdeen from The Hunger Games, Kate Middleton, pregnant Beyoncé, Lisbeth Salander, and even Lady Gaga's male alter ego, Jo Calderone. Our editors dressed up as each of them to show you how — watch!