I prefer the model's expression in either of the two previous shots. She looks a little haunted, almost deranged here but is quite a vivacious person in reality.
As Bill says there are competing subjects here OR maybe not if we knew of the symbolism, if any, of the background.
Somehow the viewer needs to be able to tie in the two parts. For example: A 1930s car with running boards and the model looking like a gangster's moll a la Bonnie Parker.
Saw this again via the Random Photo. It's still killer! This has nothing to do with the car analogy, what's wrong with a little mystery for Christ's sake? Start worrying about crap like that you'll start making some really boring portraits... Again, love it! All the best. Shawn