The movie Black Swan was a theatrical hit this year for the brilliant acting performance by Natalie Portman, the dramatic script, and amazing fashion wardrobe designed by Rodarte. It looks like the ballerina influence is making its way onto the runways for Spring 2011 in the form of the ballerina bun. From messy side chignons to pulled back braided twists, top designers are showing off this style in their runway collections. It’s an easy and quick way to dress up any look, and a favorite of actresses on the red carpet. Check out a few backstage looks below for fresh ways to wear the bun this year.