Fashion Week favorites Kendall Jenner, Karlie Kloss and Gigi Hadid rocked some sweet, 70s-inspired curls on the DVF runway, all to complement the designer’s retro-glam wrap dresses and flirty, floor-length gowns. Big, bouncy waves like these are fairly easy to achieve—the trick is to use a bodybuilding shampoo and conditioner before styling, and to finish off with a few spritzes […]