Ok, this photo was made in a funny and strange way.
I had this idea in my mind for a couple of days, but between my head and the "paper" is a big difference....
My initial idea was to take a picture of the sky at night ( and I made it ) and then, take another one at home for the foreground and stack both with PS.
But seating in front of my desk I star to mount my tripod and the D90+Nikon 35mm combination and I've opened the night shot (from the last night with a moon) to see it in my computer display, them I put the Wall-e in front of the LCD and start to imagine the final result.
At the end I made this photo with no stacked layers; the sky that you see is from my computer LCD display and the Wall-e light comes from the flash led of my Nokia cell phone ^_^