Plus, find out which Victoria's Secret Angel has never watched "The Wizard of Oz."

Established luxury houses aren't the only ones making great dresses these days.

The perfect mix of sweet and chic.

And Ralph Lauren is dressing Calvin Klein for the Met Ball.

And Madonna went full-on Khaleesi to celebrate Purim.

Is the Bambi sweatshirt the new Rottweiler tee? Seems like it...

Kate Moss goes black and white on one of bi-annual glossy Zoo's four fall-winter covers, with Kristen McMenamy, Jamie Bochert, and Charlotte Gainsbourg nabbing the others. {Fashion Gone Rogue} Mossy's also snagged i-D's winter cover--in the form of a cute, winking (obv) outtake from a 1995 Calvin Klein campaign. {Grazia} Alexa Chung and the cutest pigtails ever cover Nylon's October issue. {Nylon}

Keri Russell's envy-inducing mane may be her signature, but she's been wearing some pretty flawless things on her press tour for Austenland, including this Stella McCartney jumpsuit. Adding to the perfection of this week's best dressed list is Rooney Mara, looking effortlessly chic in Calvin Klein, Diane Kruger winning us over yet again in Carven, and Lily Collins, who continues to impress us with her risk-taking choices. Click through for all that and the rest of this week's 10 best dressed!

The poster for Carine Roitfeld's documentary Mademoiselle C is here, and her fantastic behind takes center stage. Watch out Pippa, there's a new tush in town! {The Cut} Cara Delevingne is apparently to blame for the decline of an entire product market, just for having eyebrows. But seriously--tweezer sales are down, and Google searches for Cara's name and "fuller brows" are way up. You do the math. {Daily Mail} Amanda Seyfried mixes grunge and punk for the September issue of Glamour Paris. {Fashion Gone Rogue}

This week, we were quite impressed with Beyoncé's super chic performance outfit, and Amanda Seyfried's super chic side boob-revealing red carpet frock--both from Gucci. We also got weirded out by Downton Abbey's Lady Mary and Lady Edith showing up in modern times--looking really cute in Elie Saab and Moschino, respectively. Not to be outdown, Anna Wintour proved chicest of them all in a custom Dior number. Click through for all that and the rest of this week's best dressed.

Rihanna has new hair AGAIN. And we kind of think it's her real hair for once. {Instagram} Why was Michelle Obama snubbed from Vanity Fair's 2013 International Best Dressed list? Here are a few (no more justifiable!) reasons. {The Daily Beast} Chloe Grace Moretz looks every part the Hollywood screen siren in a spread shot by Patrick Demarchelier for Glamour's September issue. {The Front Row View} Lululemon is in hot water once again, with plus-size customers feeling less-than-catered-to by the upscale yoga wear chain. {HuffPo}

Amanda Seyfried, also known as the new face of Givenchy and Karen from Mean Girls, covers the August 2013 issue of Elle. Seyfried's always had a bit of a good girl image thanks to demure roles in Big Love and Les Miserables (even if she was a bit slutty in Mean Girls), but her time has come to shed all that by playing a pornstar in the forthcoming film Lovelace--and by talking about sex in her Elle cover story.

Guys, in case you haven't heard: we're holding our first-ever conference on June 21, and the one-and-only Zac Posen is our keynote speaker. Along with plenty of great advice, Zac will share some favorite moments from his own career. We got a taste of what's to come at his resort presentation this week, where Zac revealed one of his favorite red carpet moments—and what made it so great.

From Glamour's "These Girls" event, where Alexa Chung and Dianna Agron shared stories of feminism, to the glam Billboard Music Awards, there were several events other than Cannes which drew a stylish crowd. Click through to see them all.

At 58, Carine Roitfeld is more in demand than ever. According to WWD, the editrix worked both sides of the camera for Givenchy's fall 2013 campaign--styling and starring in it. While Roitfeld is no stranger to styling high profile ad spots, this is the first high fashion campaign she's fronted.

Though she's only 20, Karlie Kloss has already cemented her status as one of the industry's top models with that fierce runway stomp and legs that never quit. Now, she's putting her pegs to good use, collaborating with denim brand Frame on two styles of jeans meant for long-legged ladies like herself.

Here's a first look at Amanda Seyfried's Very Irrésistible Givenchy campaign. {Grazia Daily} Topping Glamour UK's annual "50 Best Dressed Women" list (and beating Kate Middleton!) is... Kristen Stewart? Umm... {Glamour UK} Carla Bruni talks about the difficulty of being pregnant at 43, which made her feel ugly and want to throw away all her clothes. {Daily Mail}

Amanda Seyfried has landed her very first high fashion campaign--though with her looks (and acting chops) we have a feeling it most certainly won't be her last. The 27-year-old actress has replaced Liv Tyler as the face of Givenchy's Very Irresistible, WWD is reporting.

Don't expect Prada prices to drop anytime soon. Miuccia Prada explains to Women's Wear Daily why her covetable designs cost so darn much. {WWD, Subscription required} MTV Movie Awards host Rebel Wilson let both of her left nipples say hello onstage last night. {US Weekly} How does Allison Williams wash her face every day? With cleanser and "a piece of sterile gauze." Of course. {Who What Wear}

The red carpet at the MTV Movie Awards is a great place to see riskier looks. Would you see a crushed cigarette hat at the Oscars? Probably not. But Pitch Perfect's Hana Mae Lee wore one last night.