Last Night's Look: Love It or Leave It?

We can't stop talking about Jessica Alba's elegant one-piece, Sienna Miller's burgundy frock and more styles stars were just spotted in. Check them out, then vote fashion-forward or fashion fail?

01 of 51

JESSICA ALBA

JESSICA ALBA
FameFlynet

And the (made-up) award for most glamorous jumpsuit ever goes to in her Emilio Pucci onesie for the Mission Hills World Celebrity ceremony in Haikou, China. What put her ahead of the other (imaginary) contenders? The built-in neck bling, edgy-chic ear cuffs, silver Thalé Blanc clutch and matching metallic Giuseppe Zanotti heels.

02 of 51

SIENNA MILLER

SIENNA MILLER
Xavier Collin/Everett Collection/Alamy

There have been slews of white dresses on the red carpet recently, so we’re considering Sienna’s asymmetrical oxblood Erdem with a mesh panel an autumnal palette cleanser.

03 of 51

ELLE FANNING

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David Buchan/Getty

Even after ditching her long blonde locks last month, Elle still goes for a gown (by Marchesa) with Disney princess potential: ethereal and romantic with a touch of sparkle for the Lowdown Hollywood premiere.

04 of 51

MELANIE GRIFFITH

MELANIE GRIFFITH
Kevork Djansezian/Getty

One might think that for a Power of Pink event in West Hollywood you have to wear, well, pink. Melanie opts for a demure cocktail dress with a lace neckline and subtle Peter Pan collar.

05 of 51

CAMILA ALVES-MCCONAUGHEY

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Frazer Harrison/Getty

Also at the Power of Pink event in West Hollywood, rather than picking a pop of magenta, Camila sticks with soft and neutral variations on the shade on a white backdrop.

06 of 51

DIANNA AGRON

DIANNA AGRON
Jon Kopaloff/FilmMagic

We aren’t sure if we spot super-subtle winking eyes on the overlay of Dianna’s dress at the Brian Bowen Smith WILDLIFE show in West Hollywood, nor can we tell if those little embellishments on her sandals resemble thorns. Another thing we’re unsure of? If this look is a hit or a miss.

07 of 51

CHRISSY TEIGEN

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Dimitrios Kambouris/Getty

The model goes fuchsia and flowing for the FGI Night of Stars in N.Y.C., and though she looks more covered-up than we’re used to thanks to this voluminous DVF gown, she’s still rocking a plunging neckline.

08 of 51

CARMEN ELECTRA

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Larry Marano/WireImage

The graphic print on the body-con dress Carmen wears to host Berman and Berman Fright Night in Boca Raton, Fla., is super busy (we think we spy a tic-tac-toe motif on her sleeves?), but we can’t take our eyes off of her tummy cutout.

09 of 51

EMMY ROSSUM

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Jon Kopaloff/FilmMagic

The actress opts for a sleek and structured monochrome Camilla and Marc dress at the Brian Bowen Smith WILDLIFE show in West Hollywood.

10 of 51

NAYA RIVERA

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Jon Kopaloff/FilmMagic

Also at the Bowen Smith WILDLIFE show in West Hollywood, Naya chooses a plunging eggplant gown, dainty gold sandals and a bombshell blowout.

11 of 51

KRISTIN CAVALLARI

KRISTIN CAVALLARI
Valerie Macon/Getty

It’s definitely tough to hail a cab in in West Hollywood, so it’s possible that Kristin picked this dress for the TORRID Brand Dinner so she’d be able to flag one down without having to raise her arm.

12 of 51

DUCHESS CATHERINE

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Andrew Parsons/i-Images/Polaris

The continues her sexy-glam streak when she steps out in a crocheted Temperley dress with a graphic design. She accessorizes with a black clutch and coordinating stacked heels for her third appearance in as many days: an Action on Addiction gala dinner in London.

13 of 51

KALEY CUOCO

KALEY CUOCO
Faye Sadou/UPA/Retna Ltd.

For the ASPCA event in Bel Air, Calif., the actress gives the menswear trend her own spin by adding three feminine touches to her Issa trousers: a top that ties at the waist, revealing a sliver of skin, pointy pumps and smoky bronze shadow.

14 of 51

NIKKI REED

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Xavier Collin/Celebrity Monitor/Splash News Online

Another star at the ASPCA red carpet, Nikki goes for full-on romance in a black Monique Lhuillier embroidered dress (we love the ankle-skimming length), Jimmy Choo sandals and an undone updo.

15 of 51

JANUARY JONES

JANUARY JONES
Michael Kovac/Getty

We wouldn’t usually think of brown as a night-out look, but long-sleeved, tropical-print Marni dress for the Restoration Hardware Gallery opening is so fun, we’re reconsidering. Especially when styled with nude Marni pumps, an unexpected Mary Katranzou cross-body bag and teal eyeshadow.

16 of 51

NICOLE SCHERZINGER

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Eamonn McCormack/WireImage

The PCD frontgal packs tons of attitude at the MOBO awards in London, thanks to a laser-cut leather number by Ermanno Scervino and Gianmarco Lorenzi ankle boots.

17 of 51

JESSIE J

JESSIE J
Tristan Fewings/Getty

Another star to take a style risk at the MOBO awards, the singer flaunts a lot of sparkle (and a lot of skin) in a sternum-baring jumpsuit.

18 of 51

EVE

EVE
AKM-GSI

Looks like Eve also got the MOBO awards all-statement-everything memo. She pairs a body-con sequin mini with oversize hoops, red lips and major blunt bangs.

19 of 51

KATE HUDSON

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Axelle Woussen/Bauer-Griffin

All that glitters is ! The actress, who just streaked her hair pink for a good cause, dazzles from head to toe in a blush, sequined strapless Jenny Packham gown and a pearly Edie Parker clutch at the American Cinematheque Award gala honoring .

20 of 51

REEESE WITHERSPOON

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Jon Kopaloff/FilmMagic

Also the American Cinematheque Award gala, selects a satin Prabal Gurung gown with a brush-painted rose print, adding a pop of color on her lips and nails.

21 of 51

ANNE HATHAWAY

ANNE HATHAWAY
Jon Kopaloff/FilmMagic

goes for a vampy vibe at the American Cinematheque Award gala, pairing her very long-sleeve (the fabric extends to her fingers) lace Christopher Kane dress with Christian Louboutin pumps and a bright red pout.

22 of 51

JESSICA CHASTAIN

JESSICA CHASTAIN
Gregg DeGuire/WireImage

Also at the American Cinematheque Award gala, Jessica brings the sunshine in a yellow Givenchy Couture gown featuring a bejeweled neckline and a textured gold belt cinching the flowy silhouette.

23 of 51

KATIE HOLMES

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Rommel Demano/Getty

For the 2014 Skin Cancer Foundation Gala in N.Y.C., picks a sleek Maison Martin Margiela jumpsuit with drape sleeves, which the new face of Olay accented with a rich berry lip (and glowy skin, of course).

24 of 51

JENNIFER HUDSON

JENNIFER HUDSON
Brad Barket/Getty

makes a sexy statement – though that statement may be “I just left the boudoir” – in a silky black dress that reveals her lingerie and lots of nude fishnet-clad legs (which are becoming her signature) at the Turn it Up for Change Ball in N.Y.C.

25 of 51

SHAILENE WOODLEY

SHAILENE WOODLEY
Jason LaVeris/FilmMagic

Shailene gives new meaning to the term “business casual,” working the L.A. premiere of her new film, White Bird in a Blizzard, in a black blazer, tapered pants and white-soled The Frye Company sneakers. (Hey – it could have been jean shorts!)

26 of 51

CAMILA ALVES

CAMILA ALVES
Stefanie Keenan/Getty

Camila makes a stylish entrance at the 2014 CFDA/Vogue Fashion Fund event in L.A. in a one-of-a-kind ivory Ashi Studio dress featuring a high neckline, kimono sleeves and an asymmetrical hem revealing a layer of tulle. Muted heels and a satin Aldo clutch complete the look..

27 of 51

HAILEE STEINFELD

HAILEE STEINFELD
Stefanie Keenan/Getty

17-year-old Hailee is attending the 2014 CFDA/Vogue Fashion Fund event in L.A., but she can totally head to Orange Julius with her friends after this in her age-appropriate outfit: a black Peter Pan-style collar top and blue lace skirt paired with sweet ballet-style navy Monique Lhuillier flats.

28 of 51

DIANNA AGRON

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Donato Sardella/Getty

The platinum-haired actress picks a vibrant cropped floral print jacket and matching high waist flared skirt, plus white caged heels and an Edie Parker clutch emblazoned with her name at the 2014 CFDA/Vogue Fashion Fund dinner in L.A.

29 of 51

JENNIFER LAWRENCE

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Jason Merritt/Getty

In a delicate lace creation by the late Oscar de la Renta, (who has had memorable red carpet moments in his pieces before) looks elegant at ELLE’s Women in Hollywood celebration in Beverly Hills.

30 of 51

KERRY WASHINGTON

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Jon Kopaloff/FilmMagic

Also at the Reveal Calvin Klein-sponsored Women in Hollywood celebration in Beverly Hills, opts for a futuristic Calvin Klein Collection LBD with a cobalt accent, black Christian Louboutin heels and a white Thalé Blanc clutch.

31 of 51

MICHELLE WILLIAMS

MICHELLE WILLIAMS
Pierre Suu/GC Images

Is that an eyelash curler on your dress, or are you just happy to see us? For the opening of the Fondation Louis Vuitton in Boulogne-Billancourt, France, (currently the line’s face) picks a Louis Vuitton mini from the Spring 2015 collection that’s covered with, yep, a beauty product motif. She pairs it with chunky boots and a clutch by the brand.

32 of 51

MARION COTILLARD

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Rindoff/Charriau/French Select/Getty

She may be at the opening of the Fondation Louis Vuitton in Boulogne-Billancourt, France, but the face of Dior remains loyal to her brand in a midi dress with a lacy inset collar and boots from the Spring 2015 collection.

33 of 51

SOFIA VERGARA

SOFIA VERGARA
J. Countess/Getty

Wearing a Rubin Singer dress with a geometric pattern that manages to look both Art Deco and futuristic, stuns on the red carpet at the Angel Ball in N.Y.C.

34 of 51

JENNIFER GARNER

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Jason Merritt/Getty

For this is likely as glittery as it gets! She goes for a slightly sparkly dark purple mini and adds coordinating David Yurman gems for ELLE’s Women in Hollywood celebration in Beverly Hills.

35 of 51

KIERNAN SHIPKA

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Desiree Navarro/WireImage

Some StyleWatch editors just added this pic of the Mad Men starlet (at the Broadcasting & Cable Hall Of Fame Awards in N.Y.C.) to their “holiday outfit inspiration” Pinterest board. But really, we’re on board with red taffeta and silver shoes any time of year, especially when you pull it off as well as Kiernan.

36 of 51

ELIZABETH BANKS

ELIZABETH BANKS
Jason Merritt/Getty

Don’t say we didn’t warn you! Looking at Elizabeth’s outfit at the ELLE Women in Hollywood celebration in Beverly Hills – a flowery halter from Michael Kors’s most recent collection and strappy Stuart Weitzman sandals – might induce uncontrollable springtime envy.

37 of 51

JULIANNE HOUGH

JULIANNE HOUGH
Jon Kopaloff/FilmMagic

Another who’s giving us summertime sadness at ELLE’s Women in Hollywood event: Julianne, who opts for a sky blue Calvin Klein Collection halter and coordinates her silver Casadei pumps with her Giuseppe Zanotti Design clutch. David Yurman jewels and her repurposed Dancing With the Stars beauty look finish the ensemble.

38 of 51

RENéE ZELLWEGER

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Jon Kopaloff/FilmMagic

It’s been a while since we’ve seen on the red carpet, and now she’s making waves (or at least wearing them!) with her Carolina Herrera dress at the ELLE Women in Hollywood celebration in Beverly Hills.

39 of 51

EMMY ROSSUM

EMMY ROSSUM
Frazer Harrison/Getty

We’re used to seeing Emmy look totally ladylike when she steps out, so this ultra-modern vampy suit and cutout Peter Pan-collar blouse she picks for the ELLE Women in Hollywood celebration in Beverly Hills is an interesting departure. “Menswear for a women s event felt very powerful and rule breaking and a little bit badass,” she tells PEOPLE.

40 of 51

LILY COLLINS

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Maria Laura Antonelli/Sipa

We absolutely love the ombré Elie Saab Couture gown that Lily pairs with deep wine lips and a wavy bob for the Love, Rosie red carpet at the Rome Film Festival.

41 of 51

NICOLE RICHIE

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Vincent Sandoval/WireImage

It can’t be easy trying to accessorize blue hair, but seems to have it down to a science, wearing a black-and-white Emilio Pucci cocktail dress over a button-up, then adding white heels and her own House of Harlow 1960 necklace to the mix (at a Bloomingdale’s event for her jewelry line in L.A.).

42 of 51

JULIA ROBERTS

JULIA ROBERTS
Jason Merritt/Getty

The sports a chic Gucci leopard-print shirtdress (a desk-to-dinner must-have – look how well it transitions to cocktails!) to the GLSEN Respect Awards in Beverly Hills.

43 of 51

LUPITA NYONG'O

LUPITA NYONG'O
David M. Benett/Getty

The star tops her all-black ensemble with a Lupita style signature: a bejeweled headband, worn to the Sindika Dokolo Art Foundation dinner in London.

44 of 51

RACHEL MCADAMS

RACHEL MCADAMS
George Pimentel/WireImage

What does one wear to celebrate one’s induction onto the Canadian Walk of Fame? Rachel answers that question with a body-skimming one-shoulder red Romona Keveza gown and a smoky eye.

45 of 51

JENNIFER GARNER

JENNIFER GARNER
Michael Tran/FilmMagic

For the 10th annual Elyse Walker Pink Party in Santa Monica, Calif., wears (you guessed it!) a little pink dress by Dior, about which she said “It’s so pink and it’s so girlie but it’s still a little bit serious.” She finishes the look with black Louboutin ankle-strap pumps and super sleek strands.

46 of 51

ROONEY MARA

ROONEY MARA
Stefania D'Alessandro/Getty

It’s black, sheer and belly-baring, so we’re going to assume this came from a rack marked “For Rooney Mara” months ago, and she’s just now wearing it to the Rome Film Festival premiere of Trash.

47 of 51

EMMY ROSSUM

EMMY ROSSUM
Trisha Leeper/WireImage

For the You’re Not You pre-reception at the Carmel Interational Film Festival, Emmy flaunts three major fall trends in one outfit: emerald (via her A-line dress and drop earrings), metallic shoes and chocolate-cherry lips.

48 of 51

CARA DELEVINGNE

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Fred Duval/FilmMagic

Add instant attitude to any LBD by pairing it with spiked high-tops and smoky eyes like Cara does in a Donna Karan dress and DKNY sneakers at The Face Of An Angel premiere in London.

49 of 51

KRISTIN CAVALLARI

KRISTIN CAVALLARI
Tasos Katopodis/Getty

We’ve officially found the perfect fall weekend look: A long-sleeved tee, fur vest, skinnies and over-the-knee boots, as seen on while promoting her shoe collaboration with Chinese Laundry at Nordstrom in Chicago.

50 of 51

GEORGIA MAY JAGGER

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John Sciulli/Getty

By the looks of her outfit at the Saks Fifth Avenue Dee Ocleppo event in Beverly Hills – a floral mini-dress, white slip-ons and blue-mirrored sunnies – the model is still clinging desperately to summer (and we can’t say we blame her).

51 of 51

BRENDA SONG

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Alberto E. Rodriguez/Getty

A fun way to glam up a plaid top: pair it with a bright pink skirt and matching clutch, like Brenda does at the 10th Annual Pink Party in Santa Monica, Calif.

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