Watch Katy Perry Transform Right Before Your Eyes

Katy Perry has come a long way from her beginnings as gospel singer Katy Hudson. We've followed her through her high-profile relationships, her heartbreaks, and her triumphs. We've admired her sexiest photos, laughed at her homage to Britney Spears, and followed her ongoing rift with Taylor Swift. It's all a testament to the fact that so much has changed since Katy started paving her own way in 2003. And not just internally, but externally too! See her evolution from then to now.