Like an extremely attractive girl? That gets stared at by everyone and people come up to her and compliment her etc etc? They always say there's always going to be someone better looking but is that really true?
If we assume beauty could be objective then exactly one girl would be.
If it is subjective then some girl would be the most beautiful to someone (for that moment). It is just... Beauty is in the eye of the beholder and all that, old cliche but true. The world's second most attractive girl could probably pop up to the first spot on someone's list just by flashing that someone a nice smile that the most attractive girl did not.
So it depends, how do you want to decide this? The most beautiful girl to you and to me will almost certainly not be the same. They will still be the most beautiful girls in the world, to us separately.
No it's not possible and there will always be someone hotter or more beautiful even if we were to finally figure out who the most beautiful girl truly is it will only be an opinion because beauty is in the eye of the beholder and someone else may think another girl is more beautiful.
And from your definition that would be me and many other females get treated the same way but there will always be someone more attractive. I've come to realize that. I'm no diamond and I think that there are some women that are and they think that there's someone more attractive than them... It just keeps going and going.
Nope, no one can be that beautiful. Everybody has different likes and interests, and if it's possible for a girl to have EVERY quality known to humanity, then I guess there can be the most beautiful girl.