Katy Perry: Part Of Me 3D is one of the best movies/documentaries I have ever seen! If you're a Katy Perry fan you definitely need to go see it. There were some really heart breaking moments in it. I cried like 4 different times. Throughout the movie, I felt like I was there with her. I felt like I was at the concert and I felt like I was backstage. When the movie was over, I left, feeling like I just left her concert. Thanks Katy, for opening up your life and sharing this with us!