Katy flashes her silver underwear in the futuristic "Crocodile Scarab" ensemble designed by Roberto Cavalli.
Just ask this California Gurl.
The '90s live on!
Let your colors burst, sistafriend.
Because who doesn't love sunshine and happiness?
Katy floats her way onstage.
Your tent dress has nothing on Katy's.
Katy's inner-feline is caged...
Meow! Be free, pretty kitty.
Giddy up, girl.
Feel the light!
NEXT GALLERY: Fashion spotlight on Katy Perry's best looks!