H&M

The step-and-repeat might as well have been a runway at last night's Maison Martin Margiela For H&M launch party. Models and celebs flocked to 5 Beekman Street in Lower Manhattan, a dilapidated brick building — and maybe one of the coolest venues ever — to celebrate the brand's latest collaboration. Between performance art (something like interpretive dance in the sand) and cocktails, we were eying the celebs in attendance. Doutzen Kroes, Sarah Jessica Parker, Joan Smalls, and even Kanye, who were among the first to get their hands on the coveted new collab, outfitted their looks accordingly, with the line's new coats, pants, and tops — all done with Margiela's signature minimalist-cool construction and H&M's always-accessible price point. Click on to see the celebrity crew that came out to celebrate — and check out all of their H&M and Margiela styles.

'Tis the season of Lana Del Rey. On the heels of the singer's seriously cool Fall campaign for H&M, it looks like we haven't see the last of her yet. Lana will remain the face of the brand's Winter campaign, too. The singer-turned-modern-day-pinup posed for renowned fashion photographer Solve Sundsbo in yet another nostalgic mix of chunky knit sweaters, faux leather pants, fur-trimmed vests, and slick puffer jackets. Like before, she's sticking to that whole Brigitte Bardot meets Valley of the Dolls vibe, but this time, with a slightly edgier Grease twist. If her signature brand of Old Hollywood-inspired makeup doesn't point to the obvious retro drama (it does), then let the subtle zipper detailing, moto-infused pieces, and vintage cars in the background provide added flashback fodder. We've got the just-released batch of Lana Del Rey for H&M Winter '12 campaign photos here, plus every Fall look worth snagging now.

Source: H&M

There's nothing better than knowing that your purchases are helping a cause. Last year, we didn't think things could get any better than H&M's All For Children collection, but that's because we hadn't seen this year's designs. On Oct. 18, the Swedish retailer will introduce its 2012 All For Children collection to benefit UNICEF at 300 stores worldwide.

While the collection includes dressed-up designs like a pink bow-detail dress, a fake-fur necktie coat, and printed tops for girls, as well as blazers and colorblocked sweaters for boys, it's the costumes and fantasy pieces that we're drooling over now. Wizard hats, magic wands, rabbit ears (and scarves), and flamingo heads are the perfect Halloween accessories for kids who don't want to go the commercial route this year. And the wall stickers and playbook just add to the fun.

As it did last year, H&M will donate 25 percent of the sale of each garment to UNICEF's work in Bangladesh to promote education and improve children's health in the slum areas around Dhaka, including those that help make the discount department store's clothes.

To help kick off the collection, H&M will host celebratory events in New York and Chicago on Oct. 18 and in Los Angeles on Oct. 20, with food, music, face painting, and the opportunity for kids to create their own iconic UNICEF Trick or Treat boxes.

Keep reading for a sneak peek at the collection, and visit H&M's site for more details about the initiative.

It's not just the clothes we look forward to with every H&M collection; the retailer scores major points with the style crowd for its always-on-point styling (and obviously for its totally accessible price points), too. For its Winter rendition, the label offers up a cool crew of jewel tones, prints, embellishments, and sharp tailoring that make looking sophisticated — and on-trend — a cinch. Of course, outfitting a lookbook is one thing; real-life dressing is another. Not to fear; we're breaking down the H&M Winter dress code right here and giving you the no-fail styling tips to put it to use all season long. Click on to see how it's done.

By all accounts, the best party of Paris Fashion Week so far wasn't thrown by a luxury brand: it was the fete Anna Dello Russo hosted to celebrate her accessories collaboration with H&M on Thursday night. Everyone from Olivier Theyskens and Peter Dundas to Karlie Kloss and Isabeli Fontana made their way to the Paradis Latin nightclub in Paris for the event, where they snacked on chocolates adorned with Dello Russo's face and took in a performance from Azealia Banks. And while Dello Russo walked the red carpet with other guests, she also made a proper entrance inside the party, descending from the ceiling in a chair decorated with oversize roses.

"We created an amusing cabaret show that, while being pure Parisian entertainment, could also function as a metaphor of the carousel of fashion," Dello Russo said. "Excess for me means success."

A look at the excessive, successful party in the video below, and here in the gallery.

The Anna Dello Russo for H&M accessories lookbook is here — and we've got every product shot to back it up. While the collection doesn't hit stores until Oct. 4, we have a feeling this is the kind of collaboration that won't stay put on the shelves for very long. Two words: fashion shower. Thus, stake out what ADR-approved pieces you want before the shopping madness even begins. Will it be the gold-embossed luggage? Or a stack of exotic animal-themed bangles? To help you narrow it down, we've picked our 12 favorite bits and baubles — snake-encrusted cuffs, Baroque earrings, a shiny turquoise clutch, and one sexy pair of boots all made the cut. Click through for our picks at the beginning, plus the complete product lineup, official Anna Dello Russo for H&M campaign, and lookbook.