And 75% of statistics are made-up
Even if I were to agree with you about America consistently producing the most beautiful women, what conclusions would you draw from that? Would you say that Americans are more beautiful than other people? Would you say it is evidence that Americans have a lot of beautiful women? or are you just making a statement in response to the "Anti-Americaness" you find in this forum? I really don't get where you are going with this to be honest If you look around here, there are many threads on this website dedicated to American and Canadian models, actresses etc.
With regard to your comments about America setting the international standards of beauty, some of that would be due to the domination of the Western media and the influence of American culture on other nations. I assume you are probably speaking from a western context. You've probably grown up and been exposed to actors on the silverscreen and internalised your society's standards of beauty. So has much of the world for that matter. However, if you want me to believe that Americans have a better gene pool than the rest of the world you'll have to do better than that.
I'm not saying that Americans aren't beautiful, as there are beautiful women in every culture, but it's probably worth taking into consideration the context in which you are making your statements (e.g. what time and part of the world you have grown up in) and also the nature of beauty (that it is subjective, but also culturally and temporally prescribed). It was probably just the way you wrote your post which may make interpretation somewhat harder for me and the rest of the people here, but I'm sure you have a culturally broader appreciation of beauty
With regards to the previous statement about Jessica Alba, Eva Mendes and Monica Bellucci not being American, I believe Surreal was alluding to their race and genetic make-up rather than their nationality. It really depends on your criteria for "Americaness" because I can name plenty of actors, models, musicians etc. that hold an American passport but don't have much, if any, Anglo-Saxon blood.
Also, I do think you are confusing beauty with fame to some extent. You start to point to globally well-known beauties (well-known in the Western world anyway) in your examples but if you lived in another culture or country, I'm sure you'll find other people that are less well-known in the Western world but maybe just as beautiful.
Anyway, I think I've basically taken Surreal's post and made it into an essay