Very interesting. As mentioned above, the upper left is a bit blank. Also, maybe it's intentional, but the backwards license plate kept drawing me, once I noticed it. Not overly distracting, but just enough.
Good picture. A very modern twist on Pop Art. I think the blank space doesn't matter that much, because if you have it as a wallpaper, my icons will be in front of that bit anyway, so you wouldnt notice it. It's a good picture, but i must say, I prefer the 'Gina-Punk' one myself...
Good use of text types, and spacing. It is a unique and contemporary re-invention of "Pop Art" and you have kept a clean - fun - feel to the work - very well done..