When I went to my military service, some clerk or whatever filled a paper with some details regarding me and at one point said 'Hair? Blond'. Even though I have brown hair (at least I think so... ;D ). That was such a shock that I remember it even now, 11 years after.
Oh and my friends have told me that in Japan when they feature western women in their porn movies, the names of the movies often have the word blonde in them, like for example '4 hours blonde teachers' or something like that. Yet some of the women in these movies have black hair.
Now I don't know if any of this has anything to do with Blondie but I wanted to mention it anyways.