That Perfect Bun
Though Shailene Woodley's character Beatrice (Tris) spends most of the film in some form of a messy ponytail, she's first introduced wearing one of the most perfect buns I've ever seen—styled by her mother (above). A little height on the top, big full volume in the twist, and not a single flyaway. Maybe her mom secretly moonlighted as a hairstylist.