When you’re , you don’t do anything halfway. The pop powerhouse likes to make a statement, and when it came time to head to the , she did it big. As the performer, cochair, and cover star, Perry was destined to make an impact, but in an oversize John Galliano–designed Maison Margiela couture gown and transparent headdress, she did a whole lot more than that. While launching memes, stopping traffic, and causing a scene on the red carpet, she epitomized the daring theme. But how exactly did the ultimate California girl transform into an avant-garde fashion siren in under 24 hours?This behind-the-scenes video gives a glimpse at everything it took to go from private jet to after-party.