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Stylish ladies are making their way through the New York Fashion Week tents this week, and no matter what they're wearing, they all have one thing in common: staying warm. This gal looks supercozy with her piled-on charcoal-gray blazer and wool coat ($99), and still manages to deliver the perfect pop of color with an emerald green pleated skirt ($360). Add black tights, riding boots ($138), and a structured handbag, and you've got it made. Shop similar pieces by clicking the items above.

Photo courtesy of Greg Kessler

Kate Hudson proved that her pregnant style shows no signs of slowing down. Opting for a biker-chic look, she pairs black basics, like leggings and a turtleneck, with cool plaid and a motorcycle jacket and boots ($130). Her delicate leaf ring ($15) is a pretty touch, while Ray-Ban shades further the rocker flair. Click the items above to shop a similarly laid-back cool look.

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Sienna Miller's always-effortless combo of bohemian and cool makes this London night-out look a standout. She layers up a knit dress ($180, originally $448) in a soft palette, adding a cozy cardigan, then finishes with a rocker edge, thanks to a fringe-trimmed wrap ($20, originally $49) and her Balenciaga motorcycle bag. Click the items above to shop a similar style.

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Cameron Diaz always exudes effortless cool. This time, the actress stepped out in skinny J Brand denim and a silky button-down ($69). It may be simple, but paired with suede high-heel booties ($265, originally $435) and lots of pretty gold jewels, the result is totally chic, without any fuss. Click the items above to shop a similar style.

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For her styled appearance at the launch of eBay's Fashion Lookbook, Whitney Port chose a ladylike look with cool-chick edge. Pleated trouser denim ($193) and a white tee are the simple starters, while a metallic tweed jacket ($54), embellished Jimmy Coo heels, and loads of amazing Swarovski and Ippolita jewels add sparkle. Click the items above to shop a similar style.

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Emmy Rossum usually catches our eye in something quirky-cute. Today, it's a casual chic look — her unexpected pairing of a unique, draped dress ($122) and midcalf boots. A leopard print Coach bag ($98) is a little extra fun, and gold and black jewels finish off the strut-worthy street wear. Click the items above to shop a similar look.

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Jessica Alba's been on our radar all week long, and this casual change-up is no exception. Obviously sheer is a daring style statement, but if you know how to wear it, and tame it with a cropped blazer, it can be a subtle take on sexy. Finish with slouchy boyfriend denim ($72, originally $180), a pair of smart flats, like this Corso Cosmo pair ($114), and a mixed metal necklace, and you've nailed trendsetting casual wear. Click the items above to shop a similar look.