After teasing us with glimpses of her in camouflage getting down and dirty with the military, Katy Perry has finally released her Part Of Me music video.

It's badass. It's explosive. I know it's a cliche but it's Katy Perry as you've never seen her before.

Katy Perry's character appears to channel Demi Moore in G.I. Jane and ends a relationship with "Jason" (not me), enlisting in the US Marines - undergoing one heck of a transformation (and a rough and tumble boot camp).

We see Katy...

- take a pair of scissors to her hair and strap her boobs down
- get yelled at by her sergeant
- engage in hand-to-hand combat
- reminisce about the past
- paint her face
- dance under the American flag