Many models have never had orthodontics. Having nature design your face always tends to appear more... well, natural. When an orthodontist designs your face, you really should be asking to see their prior work... er, portfolio.  Every orthodontist out there has some beauty queens who they treated and want to lay claim to. It doesn't mean that they are the best orth, per se.

But to be blunt, the top female facial models are generally class 2. This is not because their mandible is back... but because their maxilla is forward.*  Any orthodontist's work is incomplete until dentition is class 1 - as it should be.  Camera distortion accounts for the class 2 look that presents well to the camera.  In person, class 1 is common in beauties.  This is the case for those who compete for in-person beauty titles. 

Often, female models have crowded lower teeth.  It can be sometimes hard to see this, but I wanted to share one such example: 

https://radaronline.com/exclusives/2018/11/cara-delevingne-head-naked-video-lord-of-the-rings-gollum/

I wasn't sure if she has a crossbite and I honestly couldn't tell from this video.  I guess as we keep looking down this path to beauty, things get stranger and stranger.  ;-)

One thing especially relevent is that many beauties don't have crazy width, but more length in their arches.  I suppose this makes sense when trying to acheive decently big lips and well supported eyes... and less roundness to the face.  I feel strongly that a high palatal vault can be problematic for under-eyes, too.  I'm almost convinced at this point that models are truely freaks of nature!

* Source: 6:18 to the end of https://www.youtube.com/watch?v=ItxQIro7Y0o&t=392s