I remember there is a proverb in the English speaking countries which goes like beauty is in the eyes of its beholder. Indeed.
And judging from your comment, you must agree that inner beauty comes more important than one's appearance.
I think this question is the one with infinite answers. Different nationalities will give you different answers. But there is one noticeable thing that a Chinese girl from Hebei just snatched the title of Miss World 2007.
En...I think the most beautiful girl must be very kind,gentle,smart,beautiful,not too fat or too thin.Well,I think it is enough for me,haha.By the way,I'd like to say the girls in the east and west are very different,but they both lovely.