Flashing a bit of boob is always in style, but it really got some play at Paris Fashion week, at the Balmain show in particular.
For its Spring/Summer 2017 line, the Parisian fashion house sent out a number of daring dresses, catsuits, capes (you name it) that required models go fully braless.
For instance, Gigi Hadid bravely modeled a plunging cooper-tone gown while Constance Jablonski's sheer jumpsuit left her almost fully exposed. There was also a cut-out, underboob-revealing top thrown in for good measure.
It seems like word got out to Kim Kardashian, whose see-through catsuit was most definitely front-row appropriate.