You go, girl! Katy Perry is officially the latest CoverGirl spokesmodel, joining an epic roster of phenomenal ladies like Christie Brinkley, Ellen DeGeneres, Pink, Janelle Monáe, and Sofia Vergara. Obviously, there's no set criteria to becoming a CoverGirl—aside from being, you know, super-gorgeous—but here's how you can tap into your teenage dream and channel Katy even if the biggest concert you've ever performed is in front of your mirror.