Tommy Hilfiger's Spring 2012 was centered around the idea of what happens when preppy style and pop art meet, let's say, in the '60s. Classic shapes — shirt dresses, capes, cableknit sweaters, skinny pants, trenches — were given Warholian hues of pink and purple, and often colorblocked together. Menswear prints, like a custom bespoke check, were reimagined on nylon anoraks and shifts. Loose-fitting colorblock dresses, candy-colored leather separates, and polished tweed swing coats made for one fun, vivid runway show. We expected preppy, but this had a playful point of view, one that encouraged mix and match, and not taking preppy too literally. Don't miss Tommy giving preppy style tips in our interview with the designer.

• Trends: Pop art, preppy, '60s, anoraks, caftans, leather separates
• Colors: Mustard, red, purple, pink, blue, glen plaid
• Key Piece: Red leather shirt and skirt, the anoraks, a suede cape jacket
• Accessories: Platform loafers in bright colors
• Who Would Wear It: Classic preppy girls who want to have a little fun and give their look a retro spin.

Zac Posen made his return to New York Fashion Week with a hefty dose of drama and intrigue. Floor-sweeping gowns are Zac's specialty, but this season he's outdone himself, offering up impeccable tailoring, sexy corsets and boning, and lots of Old Hollywood glamour. Plunging necklines were equally matched by fishtail skirts, and ample textural details delivered high-impact silhouettes on every look, while Posen stuck to deep reds, blues, black — and then surprised with a pop of lively green. It's a collection begging to be worn on the red carpet. Just click through to see all the looks.

• Trends: Old Hollywood glamour, fishtail silhouettes, sheer, tulle, deep necklines.
• Colors: Black, white, red, blues, and a splash of green.
• Key Piece: Sheer, embellished cap-sleeved bustier gown; knee-length gray-blue cocktail dress with textural embellishment and ample decolletage.
• Accessories: Charlotte Olympia ankle-strap stilettos, round and cat-eye sunglasses, sparkly box clutches from Judith Leiber, and Elizabeth Cole's decadent jewels.
• Who Would Wear It: Glamourous types with a taste for the dramatic and the ultra-feminine; Christina Ricci and Charlize Theron.

Diane von Furstenberg never disappoints; every season we expect greatness, and every season, without fail, greatness is what we get. For Spring, DVF and creative director Yvan Mispelaere were inspired by Africa, showing us gorgeous monochromatic separates, funky, romantic prints, and the brand's signature tailored elegance in a collection titled "Beginnings." "It's about light and what light can do and how light changes everything," said von Furstenberg. "I did something I've never done before — I started with white." A refreshing cotton white wrap dress with a full skirt kicked off the energetic show, leading into a beautiful arrangement of color and prints. As the collection progressed, von Furstenberg and Mispelaere highlighted tailored button-up blouses, trousers, and Bermuda shorts in clean, solid hues. Then came the prints; vibrant and eye catching as oversized floral and ikat motifs bounced off asymmetric dresses and trousers. Always one to mix things up, von Furstenberg and Mispelaere injected a little bit of the mod '60s into the collection via beaded shift dresses and beehive updos. Read more highlights below, then check out the runway show video.

Yigal Azrouel delivered high-impact brights on slouchy knits, slick leather, and silky separates for the Spring 2012 collection of his contemporary Cut25 label. We've got the full review coming soon, but in the meantime, click through for a glimpse of the covetable looks.

The inspiration for Donna Karan's Spring 2012 DKNY collection took the best of both American worlds, combining "West Coast ease" and "East Coast edge." That meant a refreshing, utterly wearable mix of structured blazers and skinny pants, mixed with flowy asymmetric dresses in crepe de chine and georgette silk. Sequin skirts were layered under oversize, slouchy silk blouses and worn with sky-high platform wedges. Her palette veered effortlessly from red, white, and blue — we loved the floral print — to soft peach and and beige. It was the kind of collection where you wanted everything in it, because you know you'll wear it every day. This is Karan's thinking; after all, the models walked in right off the street, past a parked yellow taxi outfitted with a DKNY sign, and into the show, which was set in a open garage-like space in Manhattan's art gallery neighborhood. It was New York City street style at its best, and on 9/11, a day when many showgoers had an opportunity to think about how much New York had changed in the last 10 years, it was a brilliant reminder that thanks to creative forces like Karan, much hadn't changed at all.

• Trends: Asymmetric hems, soft layering, sequin skits, digital florals.
• Colors: Red, white, blue, peach, nude, black.
• Key Piece: Asymmetric hem dresses, the floral pieces, sequin skirts.
• Accessories: Wide-brim hats, the platform wedges in neon pink and floral print.
• Who Would Wear It: Girls who transition easily between work and play, breezy and edgy. Think Blake Lively and Leighton Meester, or Whitney Port.