Her full name is Katheryn Elizabeth Hudson.
She was born October 25, 1984 in Santa Barbara, California
Fans throw cherry ChapStick on stage during concerts in honor of her song, 'I Kissed a Girl'.
She's been the only artist since Michael Jackson to have 5 number 1 hits from the same album
Some of her close celebrity friends include Rihanna, Perez Hilton and Adam Lambert.
Her natural hair color is blonde.
When she was 16, Katy Perry released a Christian pop album under her real name, Katy Hudson
Not only can she sing, but he can play acoustic guitar and electric guitar.
Katy Perry on stage
She married Russell Brand in India.
In July 2011 Katy made her film debut as Smurfette in The Smurfs.
She also has a Katy Perry Barbie Doll that she released in December 2011.
Katy released a fragrance in November 2011 called Purr.