The 'documentary' is actually a collection of video gather from Katy's biggest tour ever where it compile life of a Diva moving around the world to bring cheer in fans and joy in people.
Throughout the film, everything was so colourful and so wonderland regardless whether it is costume, stage, or crowd. The fairy tale 'princess' always illustrate an imaginary world in her mind and had then successfully put her believe to the crowd stage after stage, concert after concert.
Like usual, fans would definitely support and loves what the idol do and haters will gonna hate, after all you can't satisfy every single soul in the world right? Thus the film to me is targeted toward Katy's fan while others may wanna consider stay out.
The film also consist of Katy's life during the tour and also her love life before their breakup. The crucial question when you decided to watch this film is whether worth watching it in 3D? Big NO NO. From my perspective, they did not shoot it the 3D way and it offer nothing different in terms of angle from any other concert. To me it is not intended to have a 3D in the first place but somehow they decided to go on since every other movie did so.