I suspect apropos is somewhat right, but I'm also inclined to say that French/Parisian women are more confident which is a trait that typifies the French as a people. More confidence breeds better dressed women, I would say. I would also say the people of Southern Europe, including the French, place more emphasis on appearances than do the people of North America or Northern Europe.
With respect to the discussion above I believe dressing well and being attractive are two different things. I'm not attracted to women that are overweight but I still believe they can dress well:
While looking French, this is a Dutch singer btw.