Russell Brand, might this new attitude have anything to do with you?)
The 30 second clip shows Katy in head-to-toe camouflage, jumping out of a tank and taking part in some form of scary military exercises.
We wonder if she took any inspiration from Rihanna's Hard video? (Although to Katy's credit, this looks like it's going to be less mini dresses and leotards, more unashamedly unattractive combat trousers, face paint and army jackets.)
Have a looksee:
And talking of Rihanna, the singer's been chatting about her good pal Katy Perry - confirming that the two are definitely, absolutely, 100VIRTUAL-Gallery-138046%