To Pac man: That is an interesting teitch of leitzana achas docheh meah tochachos. I believe the word tochacha is more conventionally translated as reproof.
As far as the general topic is concerned, I would advise all commenters to look at the gemara in ksubos. It explicitly permits looking at the Kalla in such a way that would give the appearance of being mechabev her to her husband. It is similar to the comment of Kalla naeh vachasuda. Normally a male would NEVER comment on the appearance of a woman. But to be mechabev her on her husband, and increase the simchas chasan v’kallah, it is muttar. Yes, it is human nature, and the gemara recognizes it is so, that if the chosson thinks that others recognize that his kalla is attractive, he will feel better about his choice.
I don’t know that this is the kavana of these form fitting eye attracting dresses, but for the kalla herself it is probably not such a big avla, based on the above gemara.