GLENDALE, AZ - FEBRUARY 01: Singer Katy Perry performs during the Pepsi Super Bowl XLIX Halftime Show at University of Phoenix Stadium on February 1, 2015 in Glendale, Arizona. (Photo by Elsa/Getty Images)
GLENDALE, AZ - FEBRUARY 01: Singer Katy Perry performs during the Pepsi Super Bowl XLIX Halftime Show at University of Phoenix Stadium on February 1, 2015 in Glendale, Arizona. (Photo by Elsa/Getty Images)