Where did Katy Perry write her songs?

Katy Perry has written songs in various locations throughout her career, including:

- Santa Barbara, California: Perry wrote her debut album, "One of the Boys," in Santa Barbara, where she was living at the time.

- Los Angeles, California: Perry has written songs in Los Angeles, where she has lived for many years.

- New York City, New York: Perry has written songs in New York City, including the hit single "Fireworks" from her album "Teenage Dream."

-Nashville, Tennessee: Perry has written songs in Nashville, which is known for its country music scene.

-London, England: Perry has written songs in London, where she has spent time living and working.