You've dreamed of this day for years, and now it's finally arrived. You're going to take your little girl shopping for a prom dress. You envision a fun afternoon filled with gorgeous gowns, a dressing room Instagram shoot, and a postshopping dinner. Well, we hate to say it, but finding the perfect prom dress isn't what the movies make it out to be. There will be several screaming matches, a few tears, and tons of tulle. Here, a GIF-filled guide to prepare you for your upcoming shopping adventure.