Williams worked a not-so-simple pony (it took 90 minutes!) for the Target & Neiman Marcus holiday collaboration launch party in N.Y.C. "It takes so long," the actress told InStyle.com of her updo. "There's something about a ponytail that's really difficult to do. Even on Girls, when I have to wear a ponytail, they have to allot extra time." This time though, she had some help: "There's not a chance I'd be able to do this myself!"