Demi Lovato is pretty badass in her new video, but not as badass as Michelle Rodriguez. Nobody is as badass as Michelle Rodriguez.
The violence is part of an explosive video which sees Demi betray Rodriguez, before the duo realise they're puppets of a shady government organisation - and wreak revenge on their handlers. Or something, it's hard to be entirely sure what's happening.
Still, the film is a visual feast (it was directed by Sin City's Robert Rodriguez) and Demi looks fierce. What more do you want from a pop video?