The artistic statement is your chance to really talk about why you chose your art and what influences it. Not sure if you are applying for acting or technical, but CalArts looks for people who want to be artists. Things to think about: why do you want to be an artist? What has influenced your own artistic expression? Who are your role models? How do you see yourself as an artist in 5, 10, 20 years? My d is currently a BFA1 actor so if you have any other questions feel free to ask!