Emmy Payne
The author of "What Katy Did" is Susan Coolidge, which is a pen name for Sarah Chauncey Woolsey. The book was first published in 1872 and tells the story of a thirteen-year-old girl named Katy Carr.
Katy Perry wrote the song herself, there are no co-writers credited.
Katy Perry.
How you wrote it =)
Katy perry wrote her songs at school because she was a Gospel singer at church and Katy perry wanted to become a real singer so Katy perry first wrote her songs at school.
Emmy Payne
Katy Perry
Katy Kelly
Kathryn Elizabeth Hudson (known as Katy perry)created that song and may had a bit of help with that song
How you wrote it =)
Katy Perry
It was Dark Horse.