Prism, which featured additional hits "Dark ... following "Firework" and "Dark Horse." Revisit Katy Perry's "Roar" music ...

This spring, pop star Katy Perry will hit the road for her first tour in seven years, which includes a May 13 stop at Target ...

Following the success, they linked back up to write the No. 1 hit "Roar" as well as "Birthday" and "Legendary Lovers" for ...