Yes, perhaps her event wasn’t age appropriate. Nothing about this situation is okay, but I don’t think you describing Noah as “looking like a prostitute” is acceptable in any way.

So many celebrities wear shorter skirt and leather jackets, then are pointed out as “stylish” or “edgy”. To compare Noah to a prostitute when so many others in that same hollywood lifestyle are dressing the same and being appreciated for it, is both disgusting and unacceptable. You’re essentially shaming a young girl for attempting to live up to what has been promoted and advertised as an ideal. She is 13, she will try to look older. It’s up to her parents, herself, and perhaps a stylist to decide what is acceptable, not you. Saying she “looks like a prostitute” is hypocritical.