Although Katy Perry is best-known for frothy, off-the-walls pop music, the Billboard Hot 100 topper opened her Thursday (Jan.

Katy Perry (née Katheryn Hudson ... which featured five No.1 singles, including "California Girls," "E.T." and "Firework." She has released five studio albums which have culminated in 50 billion ...

By Joe Lynch Executive Digital Director Although Katy Perry is best ... on the screen behind her. “California, we always rise. And we always roar, don’t we?” Perry asked after the powerful ...