Prepare yourself for a bombardment of tutus, feathers, and knits -- Rodarte fans are swooning everywhere! It's bad enough that people are clocking in more hours at the gym because of Black Swan, but now clothing designers are banking on the film's popularity in hopes that consumers will flock to their stores, too.

Costume designer Amy Westcott worked with Rodarte duo Kate and Laura Mulleavy in bringing the gothic fairytale looks to life. "We had an affinity for the subject matter," Kate said. She added that it helped her understand the "darker nature and twisted kind of underbelly" of the ballet world.

Lagerfeld's Spring/Summer 2011 collection already reflects a feminine-with-a-dash-of-darkness theme, complete with dark eye makeup, sheer materials, and jeweled fabrics. BCBG Max Azria and Lipsy of London are due to sell tutus come this Spring.

Amidst this dance craze, let's not forget that there's always American Apparel.