In January, lots of fashion magazines tend to go on diets, as many of their readers will do, shedding the weight that kept them so nice and plump and warm in December. But now's the time to start stripping down and showing readers the spring fashion they won't be able to wear for another few months. And this spring is all about pants — long, flowing, wide-legged ones — as Vogue and British Vogue so spectacularly illustrate. Getting on board is not hard to do when Karlie Kloss makes them look so fun and swingy. If voluminous pants aren't your thing, Gwyneth Paltrow models an astonishing snakeskin lace-up pair for InStyle, while Marie-Louise Parker wears none at all for Esquire. See those images, Keira Knightley, Ryan Gosling, and more in the slideshow.