Nation LTD

Jessica Alba worked a modern retro look — a button-front Nation LTD skirt, ankle-strap Givenchy jelly sandals ($190), and her signature red Stun shades ($18) — while lunching with her family in LA. A black leather belt cinched her printed tank and ladylike skirt to show off her fit frame, while an envelope crossbody bag, turquoise leather hobo, and matching wrap bracelet completed her Sunday style. Work a button-front skirt, printed tank, and ankle-strap jelly sandals to re-create Jessica's effortless look for your next sunny stroll.

Rachel Zoe grabbed lunch with her son Skyler in West Hollywood and naturally looked all the bit glamorous while doing it. She started off with this Nation LTD beige tunic maxi gauze dress ($184), which she belted at the waist for definition. Then she dressed her neck with a chunky gold necklace, her wrist via a gold watch, and her feet with tan ankle-strap wedges. She finished off with oversized round sunglasses and a new bag, the tan version of this Givenchy satchel ($2,405). We adore Rachel's earthy chic color palette, and if you do too, re-create the look with similar pieces below.

Sarah Jessica Parker strolled NYC in an effortless look: a gray long-sleeve tee and gray Nation LTD button-front midi skirt, which she accessorized with studded t-strap sandals and a vintage saddle bag. The actress's black wrap shades, wide pyramid bracelet, and diamond studs were the perfect finishing touches to her weekend style. Re-create SJP's breezy Summer look with a button-front skirt, matching top, and embellished sandals, or if you're feeling fiery, score her exact skirt in red ($60) to pair with everything from neutrals to prints.

By now, you're probably familiar with Mondo Guerra, the charismatic Project Runway season eight finalist. Mondo announced his HIV-positive status on the show and is using his newfound celebrity to gain awareness for AIDS research. So, he's designed two super-stylish, limited-edition tees ($50) for Piperlime that are available today — World AIDS Day. The designs infuse Mondo's bold style and energetic graphics, and for every tee sold, Piperlime will donate $20 to amfAR. There are only 300 of them, so what are you waiting for? Head over to Piperlime now to grab a tee and do your part.

Sweatshirt tops, one of the few tops you can wear to a sleepover and a party. And, obviously, for a sunshine stroll. Reese opted for a cool shrunken navy sweatshirt top, to sport up her fresh white skirt. Don't underestimate the sex appeal of one of these — Flashdance, anyone?

My fascination started with Bar Refaeli in her streamlined Hurley maxi two years ago. Who knew a heather gray maxi could be so sexy? I was enamored; I got Bar's exact dress. Then you may recall Vanessa Hudgens in a similar style a couple weeks ago. Again, sporty fresh. Now it's Zoeinator-fighter Rachel Zoe's turn in a draped and layered Nation LTD version. Three different women, three different approaches, one style. Fascinated yet?