IMHO.
I'm an older pudgy chick who would love to have her figure, but I agree. I have seen really pretty girls, skinny girls, who look pudgy at best or completely unshapely in those low-riding jeans that are too tight and shirts that are too small. I've never seen a young woman that looked good in them. I don't get it.
Some think the fashion appeals to a pedophile nature - like they just busted out of their child clothes this morning. I dunno.
All looks pretty good to me!