The chalk or the moustache

I spent a while looking at this chalk drawing on a sidewalk. I still can't figure out whether someone saw a fake moustache on the pavement and drew a face around it. Or whether some wag stuck a fake moustache onto a chalk drawing.

The figure appears to be female, so the moustache seems like a later addition, but who knows, maybe the mouth was drawn on after the moustache. I really shouldn't let this stuff bother me.