I would say there's plenty of description, but no focus as to what makes her "the most beautiful girl" you'd ever seen...
Normally, when one is struck by beauty so spontaneously, there is something singularly striking...either facial features or a more-general aspect like "poise" or "radiance."
The fact that you start off with what she's wearing then list of a series of features takes away the sense of a spontaneous "wow" moment. It's sort of like saying "hey, I have something really important to tell you! I heard it from Bob. You remember Bob? Tall guy, used to live on Main St. He lives on 5th now because his rent got too high...."
Not only does the 'scattered' detail break the train of thought, it brings the narrator's credibility into question. If "she" was so beautiful, why include such detail as her belt?
Part of the trick to "descriptive" writing is keeping in mind that we, the readers, do not see what is in your mind. It appears that you are trying to present a "wow" moment followed by a lot of detail to illustrate how drawn to her you were. I suggest re-reading what you wrote and ask yourself "is this something that makes me say "wow?"