Although Katy Perry is best-known for frothy ... she asked before jumping into "California Gurls," which she performed while ...

Katy Perry’s onstage costumes are a masterclass in camp. Since popping off in 2008, she’s worn the most whimsical pieces, ...

Katy Perry performed several of her hits, including Rise, Roar, and California Gurls, while waving the California state flag ...

Katy Perry belted out “California Gurls,” and Joni Mitchell offered a rare performance as Angelenos spoke movingly about loss — and resilience.

Although Katy Perry is best-known for frothy ... she asked before jumping into “California Gurls,” which she performed while waving the California state flag and bounding back and forth ...