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Before hitting the Billboard Music Awards red carpet in blue sequins yesterday, Taylor Swift showed us how to look every bit as cool, all while maintaining a feminine flair. During a Beverly Hills shopping session with a friend, the singer tucked a printed top with an always-adorable Peter Pan collar into a burgundy pleated miniskirt. She then pulled in the perfect accessories: her favorite Mark Cross messenger bag, tan woven oxfords, and black Ray-Ban Wayfarers for an edgier finish. Next time you hit the retail circuit, reference Taylor's girlie-cum-cool creation and don't leave home without your favorite add-ons. To get similar pieces, shop our picks below.

Our weekend motto to slow down and take it easy certainly applies to our wardrobes, too. Borrowing from Emma Watson's effortless travel style, we're putting that philosophy into practice with a figure-flattering, fit-and-flare white dress, like Emma's A.L.C. version, that's brunch- or even cocktail-appropriate with the right accompaniments (read: a great all-occasion investment piece). But for a low-key day, you don't have to add much — just stick to Emma's flirty-gone-tough-girl styling formula and add in ankle boots, your go-to shades, and a hands-free crossbody bag. Simple, right?

Shop clockwise from top: Rag & Bone white Niki flare dress ($570), Rebecca Minkoff Craig crossbody camera bag ($195), Steve Madden double-buckle cutout ankle boot ($130), Ray-Ban Original Wayfarer Sunglasses ($150)

While running errands around LA, Reese Witherspoon showed off the perfect office-chic look: a crisp white button-down blouse, topped with this Helmut Lang black sweater ($220) and black skinny jeans. For accessories, the actress chose trendy gold and black cap-toe pumps, her trusty new Bulgari tote, Ray-Ban Wayfarers, a gold watch, and diamond earrings. Mimic Reese's latest look for your next day at the office by matching a white blouse with a black sweater, then finishing off with black pants and cap-toe pumps.

Taylor Swift left her LA home with new beau Harry Styles looking preppy chic as usual in a black-and-white striped top and these brown cropped Siwy jeans ($108, originally $154). For accessories, the singer chose matching brown oxfords, black Ray-Ban Wayfarers, and a new Burberry bag. Signature red lips added much-needed color to her casual daytime ensemble. Mimic Taylor's latest look by pairing a striped top with her exact jeans — on sale! — then finishing off with boyish oxfords, retro shades, and punchy lips.

Mom-to-be Malin Akerman bundled up in style donning a black leather jacket, leopard scarf, and studded brown boots while running errands in LA. She layered her noteworthy add-ons over a ruched Isabella Oliver tank dress ($155) and matching skinny jeans, then completed her strolling style with a black leather tote and classic Ray-Ban aviators. Pregnant or not, re-create Malin's cozy outfit with a few black basics, brown riding boots, and a leopard scarf for a day of errands.

Over the weekend, Reese Witherspoon had breakfast with her family in LA wearing a polished weekend look we can't wait to mimic ourselves. She threw this Autumn Cashmere side-button sweater ($320) over a crisp white button-down blouse, then finished off with true-blue skinny jeans, and brown riding boots. Ray-Ban Wayfarers ($125) shielded her eyes, while a chunky gold watch added a hint of shine. Score Reese's exact sweater now to help you stay cozy and cute all Fall and Winter.

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.

Taylor Swift was spotted out and about in Sydney looking quintessentially preppy, only this time she added a sporty twist. The singer wore this black-and-white-striped Theory sweater ($255) with cropped Hudson jeans and red Keds sneakers ($35). She then added black Ray-Ban Wayfarers and the brown leather Beara Beara messenger she's been carrying around lately. Score Taylor's exact sweater and shoes now to rock a preppy-meets-sporty vibe this weekend. Then pair the sweater with wide-legged black trousers for a work-appropriate look during the week.

While grabbing lunch with her husband Jim Toth in LA, Reese Witherspoon debuted her new Fall statement bag: this 3.1 Phillip Lim Pashli bag in aubergine ($895). She also showed off new teal snakeskin pumps, which coordinated perfectly with her purse. The rest of her look — white button-down topped with a black sweater and black cropped pants — was classic, while her Ray-Ban Wayfarers ($150) kept things cool. Score Reese's exact bag now — not only is it the hottest hue right now, but it's also one of the hottest new bags.