Katy Perry's font, thanks for helping!

the name of the font is katy berry

No, this isn't Katy Berry font, but thanks.

The "Katy Perry" font is not a font, it's a logo.
Here, here's the logo with the Firework logo too. http://oi43.tinypic.com/59y6b4.jpg

Its not a font, its handwritten

That "logo" is just a clean cover without KP photo
"Katy Perry" is not a font, but "FIREWORK" could be a font actually.