The headlamp assembly is held in place by a tab on the top (at 12:00), and a screw into a metal tab on the bottom (at 6:00).
If this bottom screw is just spinning, you should try some outward pressure at the bottom (fingers, or something soft against the paint, right?) while you turn the screw ccw.
Hopefully that will get it out. If you break the bottom tab, you will have a bigger task ahead than just the stripped hole. You may need to replace the attaching sscrew with a larger size at any rate. Write in again when you have it off, and can see what's there.
Good luck...
