(Katy Perry on her California Dreams tour in Sydney / Southern Cross Austereo)

After her appearance at the Nickelodeon Kids Choice Awards over the weekend - in an interesting slime coloured green crop top and a My Little Pony inspired purple pony tail - Katy Perry has released the trailer for her upcoming film called Part of Me, in rich, delicious 3D.

The film follows Katy around on her California Dreams tour and will be a documentary style film, giving her fans access to her life complete with footage of Katy before she was famous.

We hear that Katy's alter ego Kathy Beth Terry also makes an appearance in the film too. If Justin Bieber's Never Say Never was a silver screen success, chances are Katy's busting to blow away the box office!

Check out the trailer below - will you be watching?