Even though it came out in 2004, Mean Girls remains, in Gretchen Wieners's words, as fetch as ever. We still unofficially celebrate Oct. 3, wear pink on Wednesdays, and tell Glen Coco to go. Ariana Grande even paid homage to the film in her "Thank U, Next" music video, just in case you forgot how much the Tina Fey-penned comedy enlightened the masses. Given the cult following of the teen flick, there's a ton of fun trivia around its production as well as the cast and crew. To pay our respects to this American masterpiece, we're breaking down truly intriguing behind-the-scenes facts about Mean Girls, so scroll ahead for all the details!