Katy Perry's forthcoming 3D concert film thing now has a release date and a trailer.
Talking to Kelly Osborne backstage at the Kid's Choice awards on Saturday, Perry said: "My concert documentary is coming out Fourth of July weekend. Go and see it and be a firework!"
If you're still a bit confused about how that might work then she's also premiered a new trailer for the film which involves some motivational stuff about following your heart and clips of her dancing about on stage.
You can watch it here.
