I know I'm like 1.5 years late on this, but I finally watched this movie on Netflix the other day and it made me cry tears of happiness for Katy Perry. I've heard (and loved) her radio hits, but didn't really have any idea where she came from or how hard she'd worked to get where she is. If you have the chance to see this movie, I'd encourage you to do so.
Believe in your dreams, people. You're original. Cannot be replaced.