Katy Perry’s Evolution of Looks! I Time Machine I PEOPLE

Katy Perry’s transformation from ’Teenage Dream’ to rockin’ ’California Gurls’. Subscribe to PEOPLE! - Celebrating its 40th birthday in 2014, PEOPLE remains one of the world’s most ubiquitous, iconic, and trusted multimedia brands in the industry. PEOPLE provides viewers with up-to-the-minute breaking news, hot trends, and striking photos that ignite conversation. In this increasingly fast-moving world of celebrity news, PEOPLE has exclusively interviewed Robin Roberts, Hillary Clint