The Parisienne YSL blog has this handy step-by-step guide to create the perfectly messy, perfectly Parisian bun.
Step 1: Make your hair dirty. After showering, you can massage in either Aveda Pure Abundance Hair Potion or a homemade spray, made with one part sea salt, three parts water and a few spritzes of leave-in conditioner. Or you can just wash your hair less often and use a dry shampoo to keep your hair from getting greasy.
Step 2: Next, pull together your hair and hold it straight up, like Lucky Troll Doll.
Step 3: Then twist your hair down to a few inches above the crown.
Step 4: Wrap your hair around itself until it forms a loose bun, right on top of your head.
Step 5: Pin the bun in place with bobby pins. Anywhere from four to eight, depending on how thick your hair is. You want it loose but secure.
Step 6: Finally, pull loose strands of hair from the nape of your neck and around your face to make it look like you’ve worn the bun all day. Voila! The perfect bun!
(Photos by Anna Wolf)