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

HALLE BERRY

What better way to show off your baby bump (which seemingly grew overnight!) than by slipping on a slinky Monique Lhuillier dress with revealing lace cutouts? Halle pairs her gown with statement hoop earrings at the Rio de Janeiro, Brazil, premiere of The Call.

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

GWYNETH PALTROW

We've seen the black-and-white trend everywhere lately, but Gwyneth makes it look better than ever, wearing a white dress with a black waistband and sky-high black Christian Louboutin stilettos at the Iron Man 3 photo call in Munich, Germany.

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

ASHLEY TISDALE

Yowsa. At the Scary Movie 5 premiere in L.A., the Tiz goes for a floor-length black sequin Maria Lucia Hohan gown with a plunging neckline and sheer panels (check out those funky half sleeves!), as well as a matching clutch and sleek blowout.

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

AMANDA SEYFRIED

Amanda may be celebrating her cover of Allure's "Look Better Naked" issue, but we're more interested in what she is wearing. The actress steps out in a Roland Mouret houndstooth suit, plus a black clutch, Rupert Sanderson heels and red lips, at the magazine's party in L.A.

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

LINDAY LOHAN

In case you had any doubts that braids are hot for spring, the actress hammers home the point as she makes an appearance at the L.A. Scary Movie 5 premiere in an LBD with gold trim, accessorized with cage heels and statement cuffs.

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

MINDY KALING

The actress loves her Saint Laurent dress so much that she's worn it twice, but this time she styles it with black sandals and a simple blowout at the Verte Grades of Green fundraising event in L.A.

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

NAYA RIVERA

Also at the Allure celebration, the Glee actress steps out in a short-sleeve red dress with a peplum, as well as bejeweled heels and a black-and-gray Jimmy Choo clutch.

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

JORDIN SPARKS

The singer keeps it simple at an N.Y.C. Dress for Success event, wearing a white flouncy design with Lia Sophia bracelets and strappy red heels.

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

LAKE BELL

Showing a more conservative take on Halle's lace look, Lake is pure sophistication in her long-sleeve black Notte by Marchesa gown, worn with a green clutch and voluminous updo at the ASPCA Bergh Ball in N.Y.C.

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

KATY PERRY

What can you possibly wear after you've worn this purple sweatsuit? The singer follows it up with a dandelion-print Thakoon shift featuring a sheer hem, plus a colorful Coach clutch, selected for a Coach party to benefit the Children's Defense Fund in Santa Monica, Calif.

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

ANGELINA JOLIE

This elegant Salvatore Ferragamo black coat is a definite upgrade from the star's last ensemble. She wears it with a Ferragamo clutch and nude pumps to the G8 summit in London.

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

HALLE BERRY

Rivaling the Duchess for the title of fittest mom-to-be ever, Halle promotes The Call in Rio de Janeiro wearing a draped top, coated jeans and jewels by IritDesign and Sethi Couture.

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

DEMI LOVATO

Demi wears our weekend uniform – cargo jacket, comfy tee, leggings and bedhead – to visit the Elvis Duran show at N.Y.C.'s Z100 radio station.

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

JANUARY JONES

Her Mad Men character may have gone brunette, but we're still loving JJ as a blonde! She's working a modern Grace Kelly look in a floral Sam & Lavi dress, camel topper and Coach sandals at the Coach party in Santa Monica, Calif.

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

NIKKI REED

Also at the Coach party in Santa Monica, the actress pairs a clutch by the line with a shimmery draped Ella Moss blazer and high-shine silver pumps, worn over a basic tee and skinnies.

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

OLGA KURYLENKO

One of our current favorite red carpet style stars wears yet another jaw-dropping dress – this one by Burberry – with Martin Katz jewelry to the Hollywood premiere of Oblivion.

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

SOPHIA BUSH

Spring has officially arrived, according to Sophia's outfit: She wears her structured blue-and-white dress with a flirty topknot and pink Coach clutch at the line's Santa Monica bash.

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

OLIVIA PALERMO

Add this to our list of Creamsicle-inspired blazers we're loving. The socialite pairs her flirty jacket with a printed skirt and white blouse at an Alizé Coco party in N.Y.C.

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

HAILEE STEINFELD

The young fashionista attends the Coach party in an adorable black-and-white outfit, including a pleated midi, strappy heels and a chic mirrored Coach clutch.

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

SELENA GOMEZ

If you're used to seeing Selena in the getups she wore for Spring Breakers, this polished Marios Schwab LBD will be quite the shock. She sports the A-line Marios Schwab mini with a Lauren Merkin clutch, basic black pumps and Lana Jewelry hoops to a British Fashion Council event in Beverly Hills.

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

MICHELLE WILLIAMS

She may look like a million bucks, but the actress's dotted bodysuit, cream blazer and navy shorts cost under $100 total. They're all part of the Kate Young for Target collection, which Michelle celebrates in N.Y.C.

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

GWYNETH PALTROW

We're starting to think Gwyneth is on tour to celebrate her perfect legs and not her new book as we originally thought. She shows them off in a Band of Outsiders pencil skirt, worn with a crisp button-down and red Gianvito Rossi pumps to a signing for It's All Good in N.Y.C.

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

JULIANNE HOUGH

Busy, busy! We're talking about Julianne's schedule (she's at the British Fashion Council celebration in Beverly Hills) and her dress, a multicolor mirror-image creation with black sleeves and one unique (and confusing) neckline, plus Aldo Rise x Preen heels.

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

EMMY ROSSUM

On the other side of the country – and the other side of the style spectrum – is this actress, who selects a flowy black Dior dress with sequins at the neckline (and a clutch and shoes by the line), plus major Dior Fine Jewelry diamond earrings and bright pink lips, for the New Yorkers for Children benefit.

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

RACHEL MCADAMS

Two things we can't help noticing at the To the Wonder premiere in L.A.: Rachel's big bun and tiny waist, which she flaunts in a calf-length black Maria Lucia Hohan dress with a lace overlay.

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

MAGGIE GYLLENHAAL

Also at the Kate Young for Target launch in N.Y.C., the actress looks ready for a summer of running through open fields in her one-shoulder floral-print maxi, thought she adds some glam via a 23-carat Jacob and Co. diamond bracelet.

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

FREIDA PINTO

The actress matches the red carpet, but manages to stand out anyway in a one-shoulder red Rachel Roy dress with a diagonal ruffle across the skirt, plus a python Thalé Blanc clutch and a Joan Hornig cuff, at the Gangs of Wasseypur premiere in Hollywood.

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

OLIVIA PALERMO

The queen of high-low mixing tries her hand at high-low hemlines, but we're not convinced she pulls off this short-sleeve yellow Katie Ermilio dress, accessorized with lace-up Jimmy Choos, a metallic belt and a coordinating Jimmy Choo envelope clutch at the New Yorkers for Children benefit.

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

KATE MARA

Same shade, very different dress. The House of Cards star attends the Kate Young for Target event in N.Y.C. wearing an office-ready yellow sheath with slicked-back hair and simple Brian Atwood pumps.

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

HALLE BERRY

Yes, this woman is pregnant. Halle steps out in a curve-hugging, one-shoulder purple gown with beaded details, plus Demarco earrings and an IritDesign ring, at the Buenos Aires premiere of The Call.

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

OLIVIA WILDE

Spring has finally sprung in New York City, and Olivia welcomes the warm weather with a pretty white-and-yellow Monique Lhuillier dress, which she pairs with black Jimmy Choo sandals, Iwona Ludyga jewelry and intense blue eye makeup at a celebration of her Marie Claire cover.

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

SALMA HAYEK

The actress finds herself all tied up at the Le Monde EnchantÉ de Jacques Demy exhibition in Paris, wearing a gold shirt with a dramatic bow neckline and a black pantsuit.

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

HEIDI KLUM

For a taping of The Today Show in N.Y.C., Heidi surprises us by showing off only one of her assets – her legs – in a sparkly Talbot Runhof mini and gold accessories.

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

ELIZABETH OLSEN

Doing that cool-girl thing she does so well, the actress throws a gray blazer with black leather sleeves over a sheer shirt and distressed jeans for a screening of Disconnect in N.Y.C.

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

RIHANNA

No, that's not a piece of jewelry or some kind of bra she's wearing under her jacket – it's a tattoo. The singer poses in a cute white Rag & Bone blazer (sans shirt), A.L.C. shorts, cap-toe sneaks and dazzling Chanel earrings backstage at her Diamonds world tour in L.A.

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

WINONA RYDER

There's not much to say about her all-black outfit (although, we do love her bold red lip), but seeing Winona back on the red carpet (at the N.Y.C. Disconnect screening) is buzz-worthy in itself.

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

THANDIE NEWTON

Like Diane Kruger, this actress has the ability to make tricky styles look chic and effortless. Case in point: the red-and-white print Temperley London top and coordinating striped skirt she wears to a Rogue promo event in Cannes.

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

MAGGIE GYLLENHAAL

For a second there we thought Maggie was our middle school art teacher. The actress, who's now rocking a short do, chooses a flowy paisley-print Isabel Marant dress with a tassel belt and T-strap sandals for a Sundance Institute benefit in N.Y.C.

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

SARAH JESSICA PARKER

Tricky color, even trickier silhouette. But that doesn't stop the star from wearing this shimmery green Alexandra New York vintage number with Jean-Michel Cazabat heels, plus Cindy Chao bangles and earrings to The Art Jewel event in Beijing, China.

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

GWYNETH PALTROW

It's All Good. That's not just the name of Gwyenth's new book (which she promotes at a signing in Beverly Hills); it's also how we feel about her look: black (incredibly short) shorts, an A.L.C. checkerboard top, an oversize white blazer and black-and-gold sandals.

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

FERGIE

Is Fergie giving us hints about the sex of her baby? Because she attends the amfAR Inspiration gala in Sao Paulo, Brazil, sporting a look borrowed from the boys; a tux with a white button-down and cufflinks, all by Dsquared2.

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

OLIVIA WILDE

Another star who makes menswear look sexy, Olivia stops by the DVF Awards in N.Y.C. in black skinnies, a fitted animal-embossed blazer, an A.L.C. silk blouse, a major House of Lavande vintage pendant, gold sandals and hair we'd kill for.

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

OLIVIA MUNN

At Vogue's "Triple Threats" dinner in L.A., Olivia proves she herself is quite the triple threat in an outfit that combines 1) a floral print, 2) a midriff-baring crop top and 3) a coordinating midi skirt with some center pleating we're still trying to figure out.

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

KATE MOSS

Mental note: Find out what kind of bronzer Kate uses on her décolletage, which she shows off in a plunging black dress with three-quarter sleeves at the amfAR Inspiration gala in Sao Paulo, Brazil, then go out and buy it in bulk.

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

SARAH HYLAND

Another day, another cool braid. The Modern Family actress wears hers to the side along with a sleeveless cream Alice + Olivia dress with a touch of metallic, plus bowed peep-toes, to the Skip and Donate event in West Hollywood.

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

DIANNA AGRON

What better way to show off her new red hair than in a new red ensemble, this one a printed two-piece Derek Lam get-up (with Marc Jacobs clutch), worn to the Vogue dinner in L.A.

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

DITA VON TEESE

Leave it to Dita to be the glammest girl at the amfAR event in Sao Paulo, Brazil. She steals the spotlight in a gray Jenny Packham gown with sheer embellished sleeves and a train, plus her signature vampy lips and Old Hollywood do.

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

VIOLA DAVIS

Her dress may be simple, but there's something totally head-turning about the flirty LBD and strappy heels the actress selects for the Silver Rose Gala in L.A.

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