• KATY PERRY photo | Katy Perry

Credit: Fame; Landov

Published: Thursday January 17, 2013 11:00 AM EST



Ending things with Russell Brand in 2012 was the catalyst Katy needed to leave behind her cartoonish apparel and transition into a more sophisticated new style. She's still having fun with fashion but without those eyebrow-raising costumes, and for that (if nothing else) we've got to thank Russell.