Demi Lovato couldn't resist dropping a final, 15-second teaser for her 'Heart Attack' video, premiering tonight (April 9). It's the fourth of four and in it, she's windblown, with smoky eyes and a focused stare. She's also bathed in liquid latex.

She's coated in that black substance that's on her hands in the first teaser. She's like the villain in 'The Terminator.' Let's christen her The Demi-nator!

Teaser 1 is here. And 2 is here. Wanna see the third? That's here. Go ahead, try and string together a semblance of plot. Demi does look hot though. Rawr.