Katy Perry brought her Lifetimes Tour to PHX Arena on July 12. It was a sci-fi fever dream with "Roar," "Firework," "I Kissed ...

Katy Perry warned fans she would try to hold her composure during her performance of "Not Like the Movies" in Inglewood, Calif.

The Complete Collection, which earned five #1 singles on the music charts, is climbing up the charts once more.