see, to me it just looked like she had her hair pulled back tightly in a hairband...if you've ever tried to do that with long hair (I have), it tends to get pushed up a bit at the back and looks kind of funny. Seems to me it was kind of a typical hairstyle of the day, though.
Now, was she a natural blonde? Probably not. It's hard to tell from a black and white film, but she appeared to have dark roots, so I would say it was probably dyed.
Anyway, that was just my interpretation of it.
I know....
And the dancer in Incredibly Strange Creatures.... didn't look like a female impersonator....
But they have to have something to talk about. And when there's nothing there, why not invent it? ;)