Marc Jacobs Spring 2013 | Pictures

Here's what we learned in five minutes at the Marc Jacobs Spring 2013 runway show: it will be the season to show your underthings; who needs pants when you're rocking an awesome tee; and the '60s live on, albeit with Jacobs's quirky edge. And yes, five minutes was exactly how long it took for all 45 looks to march out from a lacquered wall with panels that swung open to become mirrors. With all the Mad Hatter opulence of Jacobs's Fall '12 collection, Spring felt pared back and free, right down to the show notes that had the most minimal descriptions I've ever seen: "LOOK 1: T-SHIRT, SHORT." Big, bold stripes dominated the show, and were brilliantly highlighted in a sequined jumpsuit that will absolutely be in high demand for Spring editorials next season. While it was an ode to the '60s, there was nothing sentimental about the collection; it felt modern and even a little tough, but that may have been the models marching down the triangular runway with hands stiffly by their sides. And while on the subject of modernity, nothing felt more fresh than Jacobs's take on a ladylike skirtsuit, with jackets cropped to reveal midriffs (note: start Pilates stat) and skirts that hung on the lowest part of the hips. Some skirts were paired with sheer tops that revealed bras done by OnGossamer, further cementing the lingerie trend for next season.

• Trends: '60s, stripes, lingerie, jumpsuits, sequins, t-shirts.
• Colors: Black and white, beige, red.
• Key Piece: A striped jumpsuit made of sequins, the cool low-slung skirts with cropped jackets.
• Accessories: Pointy flats, some with the signature stripe.
• Who Should Wear It: Those skirtsuits belong on rebellious ladies at an indie movie premiere, and we're thinking Kirsten Dunst, of course, but wouldn't Kristen Stewart be cool?! Emma Watson would be great for this, too.