1 of 50
The “happy” takes a fashion risk in a black-and-white Tom Ford creation with leather trim and structured hips at the L.A. premiere of her new film, Wanderlust.
2 of 50
Continuing to promote In the Land of Blood and Honey in Paris, looks statuesque in a one-sleeve white column gown featuring an oversize floral accent.
3 of 50
gets playful with patterns in a zigzag Kenzo cocktail dress at a Berlin photo call for My Week with Marilyn.
4 of 50
Meanwhile, Michelle’s former Dawson’s Creek turns a shopping trip into a fashion moment in a patterned blue top, khaki ankle pants and sky-high, floral-patterned YSL wedges.
5 of 50
In Austria for the Vienna Opera Ball, cuts a fine figure donning a Salvatore Ferragamo asymmetrical beaded gown.
6 of 50
Leaving lots to the imagination, the comedienne pops by the Late Show with David Letterman in N.Y.C. wearing a demure, knee-length dress with a lacy black overlay and strappy sandals.
7 of 50
The is all drama in her draped white gown and jewels at Bulgari’s “125 Years of Italian Magnificence” opening ceremony in Shanghai.
8 of 50
Jennifer’s Wanderlust costar puts a runway trend to work, pairing pink and red in the form of a cutout dress (with Neil Lane jewels and a scarlet Nancy Gonzalez clutch) for the film’s L.A. premiere.
9 of 50
Pan Am’s perky flight attendant goes edgy in a plunging blue Thakoon mini, Solange Azagury-Partridge jewels, black tights and platform heels at a Berlin photo call for her new movie, Bel Ami.
10 of 50
Also at the Wanderlust L.A. premiere, the actress turns heads with a sexy, shimmering mini and nude peep-toe pumps.
11 of 50
Looking frothy and fun in a pink embroidered Dior Haute Couture gown, Dior shoes and an ear-to-ear grin, the is all sweetness at the My Week with Marilyn Paris premiere.
12 of 50
The supermodel helps Australian chain David Jones kick off its Fall collections in Sydney wearing a paillette-embroidered Collette Dinnigan mini and pointed black pumps.
13 of 50
At the Berlin premiere of her film As Luck Would Have It, the gives a sedate black-lace Yves Saint Laurent Edition Soir dress and velvet clutch some sex appeal with green drop earrings and smoky eyes.
14 of 50
Before getting wild at her M.A.C. Viva Glam launch, the entertainer is as pretty as a painting in a Mondrian-inspired dress, chain-strap bag and lace-up booties en route to Good Morning America in N.Y.C.
15 of 50
Sugarland’s frontwoman already hits a high note before performing at N.Y.C.’s Red Dress Awards, wearing a deep red floral gown with a contrasting Day-Glo green belt and red shoes.
16 of 50
She may not be the cover girl, but the model shows she can work it in a a tiered black mini and bondage-inspired black sandals at a Sport Illustrated Swimsuit Issue event at Haze nightclub in Las Vegas.
17 of 50
Taking a solo stroll in N.Y.C.’s East Village, the is a cool cat in a blue Sportmax peacoat, green skinnies and black booties.
18 of 50
The Fashion Police cohost helps pal Nicki launch her M.A.C. Viva Glam collection In N.Y.C. in a cap-sleeve black leather Kymerah mini, hot-pink lips and Mark Fast x Aldo shoes that match her hair and makeup.
19 of 50
At first glance, Today Show look is all ladylike, with a ribbed flared skirt and gold belt, plus blush platform pumps – but a closer inspection reveals sheer stripes in the skirt.
20 of 50
Also at the M.A.C. Viva Glam launch in N.Y.C., the model (and busiest lady at Fashion Week ) strikes a pose in an oversize furry vest, waxed jeans and booties.
21 of 50
Never one to play it safe with her style, the hits an N.Y.C. Miu Miu Culte Eyewear event in a plunging, pleated frock worn with a contrasting red bag and tan pumps (all by Prada) plus David Yurman jewels.
22 of 50
At an N.Y.C. Band of Horses concert, the sparkles in an Alice + Olivia black sheath, platform pumps and her favorite Edie Parker clutch.
23 of 50
Days after engaging in some model behavior at the Heart Truth fashion show in N.Y.C., the stunner poses in a nude embroidered micromini, strappy silver sandals, Le Vian earrings and Norman Silverman rings at the L.A. Good Deeds premiere.
24 of 50
In bell sleeves and black pants, plus a fuzzy bag and Miriam Haskell cuff, the star attends “The Ever Changing Face of Beauty” reception in N.Y.C.
25 of 50
The Oscar nominee visits the Late Show with David Letterman in N.Y.C. wearing a chocolate leather Sportmax sheath, snakeskin-heeled Brian Atwoods and a chic black trench.
26 of 50
The actress warms up black separates with a fuzzy, ivory coat and mussed-up bangs at the Fashion: Take Note Studio Valentine’s Day event in N.Y.C.
27 of 50
Sports Illustrated’s newest cover girl is ready for her close-up in an off-the-shoulder, cleavage-baring red mini for a Late Show with David Letterman appearance in N.Y.C.
28 of 50
No surprise that the , whose most recent collection earned rave reviews, looks perfectly chic in a belted burgundy cardigan with a plaid Roland Mouret shift and sophisticated accessories in N.Y.C.
29 of 50
Also in N.Y.C., another SI model shows some skin in a sky-blue, lace Emilio Pucci mini and leg-lengthening pumps at the magazine’s Swimsuit Issue celebration.
30 of 50
SK-II ambassador goes bold in a futuristic, draped design and gold peep-toes at “The Ever Changing Face of Beauty” event in N.Y.C.
31 of 50
A beaming adds extra shine to her velvet halter with her pick of megawatt gems from Norman Silverman, Diamond in the Rough, Carrera y Carrera and Hellmuth for a Tonight Show appearance in Burbank, Calif.
32 of 50
The plays peekaboo in a paneled red shift, classic overcoat and patent pumps while heading into N.Y.C.’s Late Show.
33 of 50
Another day, another statuesque style! The commands attention in a dove-gray, belted column at Berlin’s Cinema for Peace Gala.
34 of 50
The A-lister gears up for the Oscars with another red carpet stunner: a peplum-and-lace frock with a harness belt, which she wears to London’s Elle Style Awards.
35 of 50
Embracing Sydney’s warm weather, Aussie native Miranda pairs a pastel tweed mini with a gauzy white blouse and gray pumps at an event for her KORA Organics beauty line at department store David Jones.
36 of 50
She’s known for her Mad Men ’60s style, but the actress channels the ’80s in a broad-shouldered, belted purple floral number worn with black accessories and chandelier earrings at an Elle Style Awards afterparty in London.
37 of 50
PEOPLE StyleWatch’s Fashion Week stops by the Empire Hotel’s Daily Style Sessions event in red pants, a white button-up and a black tuxedo jacket.
38 of 50
Rivaling Las Vegas’s bright lights in an ultra-sparkly jacket worn with a basic tee, AG denim pants and pumps, the actress hits the Strip to check out a Foster the People concert sponsored by AG Adriano Goldschmied.
39 of 50
Also at the Elle Style Awards in London, the model accessorizes her floaty, spangled dress with Irene Neuwirth earrings, an Edie Parker clutch and Sergio Rossi sandals.
40 of 50
Smash’s leading lady attends an N.Y.C. taping of Live! With Kelly in a belted sheath with tiny dots, plus booties and bronze bangles.
41 of 50
“Bad girl” gone good? The In the Land of Blood and Honey shines in a demure, beaded Jenny Packham wrap dress, Vhernier jewels and Stuart Weitzman peep-toes at the 62nd Berlin International Film Festival.
42 of 50
The takes a bow in a strapless ivory Moschino confection, Samantha Wills jewels, opaque tights and gold pumps at the Paris premiere of Journey 2: The Mysterious Island.
43 of 50
44 of 50
The Artist star stakes her claim on next season’s hot color – burgundy – in a funky, perforated bodice gown at the Orange British Academy Film Awards afterparty in London.
45 of 50
She’s no shrinking violet! puts her assets on display in an architectural cobalt gown with beaded corset detailing at Clive Davis and the Recording Academy’s pre-Grammy gala in Beverly Hills.
46 of 50
Baring her body in a sexy Herve Leger by Max Azria LBD and lengthening her legs with sky-high platforms, also attends the pre-Grammy fiesta in Beverly Hills.
47 of 50
She rocks and color-blocks! The blue bob makes for the perfect accessory to a highlighter-hued frock (with a magenta bell-sleeve top and cyan formfitting skirt) at a pre-Grammys event in West Hollywood.
48 of 50
Before going platinum at the BAFTA Awards, the Oscar nominee takes a ladylike turn at a London tea party in a turquoise lace shift with scallop trim and nude heels.
49 of 50
The Vow looks like a perfect 10 in a black leather sheath and nude pointy-toe pumps for an appearance on the The Tonight Show with Jay Leno in Burbank, Calif.
50 of 50
Also at the pre-Grammy gala in Beverly Hills, Michelle saunters in wearing a sweet and sexy abstract floral Pamella Roland gown with a plunging neckline, plus Pedro Garcéa peep-toes and a sultry smoky eyes.
Vote on Last Week’s Looks! >
Lady Gaga Returns to Her Wild Style in Cheeky Satin Marc Jacobs Hot Pants
Ireland Baldwin Gets an Early Start on Halloween with a Racy (and Bloody) Costume
Back to Brunette! Demi Lovato Ditches the Blonde After Short-lived Stint
WATCH: Rihanna Teaches Her Niece Majesty How to Do a Manicure