Beanies

While taking a break from New York Fashion Week to grab a bite at Bar Pitti, Jessica Hart covered her blond locks in NYFW's hottest hat trend — beanies! These toppers are clearly having a major runway moment — just check out BCBG Max Azria's Fall 2013 show — so take note from the Australian model on how to wear one too. Jessica completed her cold-weather ensemble with a white button-down, topped with a soft-pink ribbed sweater, black leather pants, Charlotte Olympia platform booties, and a black structured Salvatore Ferragamo bag. Shop our editors' picks below, and for more ideas on how to work a beanie, check out these celebs.

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Alyson Hannigan pushed her baby's stroller looking cool in this Rag & Bone tweed biker jacket ($375, originally $625). As if we didn't love her choice of outerwear enough, she really sealed the deal when she decided to also wear a celebrity-favorite beanie. On bottom the actress sported black skinny jeans and black ankle boots, then completed her LA look via a Chanel bag, a Jennifer Meyer nameplate necklace, and oversize round sunglasses. Score Alyson's exact tweed jacket to inject major chic into your Winter wardrobe.

This time of year is all about staying warm in layers — and with all the right cold-weather accessories. As much as we love our felt fedoras, it's high time we traded them for the much cozier beanie. They're a cold-weather staple with good reason — and thanks to iterations from Marc Jacobs and Missoni, they're as cool as they are warm (you follow?), shielding our ears from the chill while they give our whole look (just see the street style below) a sporty-chic twist. On that note, we've culled a few of our favorite options for your shopping pleasure. Just check out all of our editors' picks below now.

— Additional reporting by Hannah Weil

Katy Perry and John Mayer had dinner at LA's Matsuhisa last night, and for the occasion, Katy impressed in a casual-cool ensemble. Up top, she wore an army-green anorak over a blue tee, and on bottom, black skinny jeans and lace-up combat boots. For accessories, the singer threw on a colorful scarf, black beanie, a black crossbody bag, and brown glasses. Re-create Katy's date-night look for your next outing by pairing a green anorak with a black beanie and combat boots. Don't forget a colorful scarf for a much-needed pop of color and print.

After spending the night with new beau Harry Styles at her hotel in NYC, Taylor Swift emerged looking adorable in a dark-red beanie and brown skinny corduroys. The singer completed her preppy style with a polka-dot sweater, topped over a peter pan collar blouse, a navy coat, black oxfords, and her go-to Beara Beara brown messenger bag. Mimic Taylor's latest style by sporting a knit beanie with a pair of skinny cords, then finishing off with a navy coat, menswear-inspired oxfords, and a leather messenger bag.

Ashlee Simpson bundled up in an olive fur-trim Sandro coat and leopard Golden Goose sneakers ($560) while walking hand in hand with her son, Bronx, in NYC. Ashlee's textured topper and peppered Neff beanie ($17) kept her warm, while her plum ankle-zip denim added a pop of color to her Fall-friendly look. Classic Ray-Ban wayfarers ($150), an Anita Ko rose gold arrow necklace, and a black fur shoulder bag completed her street-chic style. Take a lesson from Ashlee and style her exact kicks with a fur-trim coat, purple skinny jeans, and a celeb-approved topper for a day of errands.

Sometimes it's difficult to create an ensemble that's both stylish and cool-weather appropriate, but Emma Stone's latest NYC look proves it's possible to be toasty and trendy. The actress styled her signature sweater and blouse combo with true blue skinny jeans and black ankle boots, then topped her cozy look with a plaid buckle coat and slouchy gray beanie. We love how her printed topper breaks up her neutral staples and adds a touch of personality to this casual daytime look. Re-create Emma's layered look with a gray sweater, blue denim, black ankle boots, a beanie, and a plaid coat for a day of errands.

With Fall in full swing, warm coats and lots of layers are in major rotation among Hollywood trendsetters, and for singer Ellie Goulding, cozy knit hats top all her cool-weather wear. Last night, Ellie chose a colorful printed pom-pom hat for a showcase at PopSugar Studios in LA. On other occasions, the singer worked a mustard knit hat at a performance in Pennsylvania, then went back to basics in a white cable-knit hat in London. Ellie's cozy-chic hats are fashionable, functional, and easy to wear, so shop our favorite picks below to stay toasty and trendy all season long.