Project Runway alum Chris March is suing Thierry Mugler for allegedly not paying him for work he did on Beyoncé's costumes for her current I AM tour. That sentence was a lot to take in: Chris March, Beyoncé, Thierry Mugler, a lawsuit. We had know idea Chris even worked on costumes for Beyoncé — and her band and her backup dancers — until the suit surfaced. Reached by phone this afternoon, Chris explained he's worked with Thierry for almost seven years on various projects, including Cirque du Soleil costumes. Beyoncé hired Mugler to create her tour costumes in November, and Chris met with Mugler about the project in late December. In January he started work.