The Twisted Chignon
The undone buns at Marchesa's Fall 2013 were created by twisting different sections of hair into a chignon at the nape of the neck. Careful to keep it a bit imperfect, wispy strands were left out around the ears.
Get the look: Use plenty of hairspray, like this option from Kerastase, to keep the style in place—and don't forget to load up on bobby pins! $35, at Kerastase.