KATIE HOLMES

The actress strikes a pose in a cozy cream sweater, light pink jeans and suede pumps at the Godiva "Share the Love" event at N.Y.C.'s Rockefeller Center.

Last Night's Look: Love It or Leave It?1 of 47 - Credit: Michael Simon/Startraks

BEYONCÉ

After belting out a knockout acapella version of the National Anthem, the singer shows off her other assets in a curve-hugging orange Antonio Berardi dress with sparkly Jimmy Choo pumps and Campbell rings at the Super Bowl halftime show press conference in New Orleans.

Last Night's Look: Love It or Leave It?2 of 47 - Credit: Kevin Mazur/WireImage

ASHLEE SIMPSON

The Throwback Thursday Bash at L.A.'s Pink Taco was celebrating the 90s, but the singer opts for an on-trend illusion neckline red Izmaylova dress, which she teams with a black studded Devi Kroell clutch, leopard heels and a major Lizzie Fortunato statement necklace that features pearls, chains and feathers.

Last Night's Look: Love It or Leave It?3 of 47 - Credit: Michael Simon/Startraks

ROONEY MARA

Go Fug Yourself jokingly predicted that the actress would never wear color again, and that prediction held true at the N.Y.C. premiere of Side Effects. The actress steps out in a paneled white Alexander McQueen dress with floral details, nude Nicholas Kirkwood pumps and minimal jewelry.

Last Night's Look: Love It or Leave It?4 of 47 - Credit: Henry Lamb/Photowire/BEImages

AMY ADAMS

Also keeping her color palate limited, the actress wears a black-and-white polka-dot peplum Jenny Packham number with peep-toe Jimmy Choo pumps, but she adds a pop of color with her green earrings at the Santa Barbara International Film Festival.

Last Night's Look: Love It or Leave It?5 of 47 - Credit: Paul Archuleta/FilmMagic

KHLOÉ KARDASHIAN ODOM

At a U by Kotex Generation Know event in N.Y.C., Khloé gives us work outfit inspiration in a black-and-white blouse (just make sure to fasten an extra button or two!) and a high-waisted pencil skirt.

Last Night's Look: Love It or Leave It?6 of 47 - Credit: Michael Simon/Startraks

CATHERINE ZETA-JONES

Continuing the black-and-white trend, the actress attends the N.Y.C. Side Effects premiere in a strapless Michael Kors gown with strappy Jimmy Choo sandals and a tan clutch.

Last Night's Look: Love It or Leave It?7 of 47 - Credit: Ramey

ASHLEY BENSON

The Pretty Little Liars actress pulls together a perfect concert ensemble – a teal leather jacket, black leather leggings, sneakers and tons of statement jewelry – for the Haley Pharo show in Hollywood.

Last Night's Look: Love It or Leave It?8 of 47 - Credit: Michael Simon/Startraks

OLIVIA PALERMO

The fashionista should teach a class on how to look incredibly chic while braving the elements. This time she steps out in a belted black peplum top with leather sleeves, skinny jeans and a Yliana Yepez handbag at an event for the designer in N.Y.C.

Last Night's Look: Love It or Leave It?9 of 47 - Credit: Andrew Toth/Startraks

CHRISTINA APPLEGATE

The actress manages to incorporate both swans and fringe into her all-black outfit at the Kumpania: Flamenco Los Angeles premiere in L.A.

Last Night's Look: Love It or Leave It?10 of 47 - Credit: Jerod Harris/WireImage

DIANE KRUGER

Mixing a menswear-inspired black vest and feminine floral pants (both by Stella McCartney), the actress attends the premiere of her new German film, Der Nächste, Bitte!, in Berlin.

Last Night's Look: Love It or Leave It?11 of 47 - Credit: Andreas Rentz/Getty

ROONEY MARA

The actress steps out in a black Band of Outsiders jumpsuit with a pop of color on her lips while supporting sister Kate at the N.Y.C. premiere of House of Cards.

Last Night's Look: Love It or Leave It?12 of 47 - Credit: Laura Cavanaugh/FilmMagic

COURTENEY COX

Keeping her look casual at the Hoorsenbuhs for Forevermark Collection cocktail party in L.A., Courteney wears a simple black top with dark gray jeans and simple jewelry.

Last Night's Look: Love It or Leave It?13 of 47 - Credit: Donato Sardella/WireImage

KATE MARA

Also at the House of Cards premiere in N.Y.C., the actress opts for another refined look, this time featuring a silver lace Dolce & Gabbana sheath with white trim and black Brian Atwood peep-toe heels.

Last Night's Look: Love It or Leave It?14 of 47 - Credit: Gregory Pace/BEImages

SHAY MITCHELL

The Pretty Little Liars actress keeps her style flirty and fun in a red flower-print mini and black booties at the Couture La La launch in Beverly Hills.

Last Night's Look: Love It or Leave It?15 of 47 - Credit: David Livingston/Getty

JAIME KING

Demonstrating how to look sophisticated while keeping warm, Jaime wears a black-and-camel jacket cinched at the waist, along with tights, booties and a blue velvet headband at the Hoorsenbuhs for Forevermark Collection party.

Last Night's Look: Love It or Leave It?16 of 47 - Credit: Donato Sardella/WireImage

CARLA GUGINO

At the N.Y.C. House of Cards premiere, the actress shows off her assets in a Romona Keveza LBD, which she pairs with a silver Daniel Swarovski clutch and peep-toe heels.

Last Night's Look: Love It or Leave It?17 of 47 - Credit: Johns PKI/Splash News Online

SELENA GOMEZ

Justin Bieber might be brokenhearted, but Selena appears to be enjoying the single life. She's all smiles as she shows off her legs in a patchwork-inspired mini with melon Nicholas Kirkwood pumps, Melinda Maria earrings and long, loose waves while celebrating her Nylon magazine cover in West Hollywood.

Last Night's Look: Love It or Leave It?18 of 47 - Credit: Michael Simon/Startraks

NICOLE KIDMAN

It's summer Down Under and Nicole is dressed appropriately! She arrives at Sydney's AACTA Awards in a strapless pale yellow Erdem dress with floral embroidery, dangling earrings and Brian Atwood heels.

Last Night's Look: Love It or Leave It?19 of 47 - Credit: Lisa Maree Williams/Getty

CATE BLANCHETT

Same event, totally different look: Also at the AACTA Awards, the Aussie goes for a futuristic vibe, sporting a skin-tight sequined Giorgio Armani Privé gown with a plunging neckline and coordinating black earrings and pumps.

Last Night's Look: Love It or Leave It?20 of 47 - Credit: Lisa Maree Williams/Getty

LESLIE MANN

We appreciate her attempt to stand out, but we're not sure she's pulling it off. Leslie steps out at the Berlin photocall for This is 40 wearing a brown-and-pink Marni outfit that features a spotted shirt with side panels, a belted pencil skirt with pleats and ankle-strap heels.

Last Night's Look: Love It or Leave It?21 of 47 - Credit: Andreas Rentz/Getty

ELLE FANNING

She never fails to get our attention with her red carpet wardrobe choices, and this time is no exception. The 14-year-old actress steps out at the Santa Barbara International Film Festival in a belted white dress with some very serious lace-up leather boots (both by Rochas) to match.

Last Night's Look: Love It or Leave It?22 of 47 - Credit: Tommaso Boddi/WireImage

ASHLEY TISDALE

Supporting pal Selena, Ashley attends the Nylon magazine cover celebration and mixes black and blues via a lace ASOS dress and suede pumps.

Last Night's Look: Love It or Leave It?23 of 47 - Credit: Michael Simon/Startraks

KATE MARA

The actress goes for pure elegance, sporting a light green Peter Som dress with intricate floral details and satin Brian Atwood stilettos at the Washington D.C. House of Cards premiere. She tops off her look with a purple statement clutch and flawless hair and makeup.

Last Night's Look: Love It or Leave It?24 of 47 - Credit: Paul Morigi/WireImage

KIERNAN SHIPKA

The young actress hits her fashion mark (no surprise there) in a fitted white button-up with a Peter Pan-collar, glittering heels and a bright red clutch at the Nylon cover celebration.

Last Night's Look: Love It or Leave It?25 of 47 - Credit: Michael Simon/Startraks

JAMIE KING

Also at the Nylon party, Jamie manages to make an all-white Elie Saab pantsuit look utterly feminine and chic thanks to shoulder cutouts and a deep V – plus a cool coordinating mani and metallic Jimmy Choos.

Last Night's Look: Love It or Leave It?26 of 47 - Credit: Michael Simon/Startraks

BELLA THORNE

Keeping it simple at the L.A. premiere of Warm Bodies, the actress accessorizes her basic LBD with peep-toe booties and a messy updo.

Last Night's Look: Love It or Leave It?27 of 47 - Credit: JB Lacroix/WireImage

ZOOEY DESCHANEL

The New Girl star toasts her Glamour cover in West Hollywood wearing a floaty A-line Monique Lhuillier dress that she weighs down with – of course – black tights and pumps.

Last Night's Look: Love It or Leave It?28 of 47 - Credit: Donato Sardella/WireImage

EMMY ROSSUM

Emmy's pretty Stop Staring dress (worn with red heels and lips and H.Stern earrings to the Conan O'Brien show in L.A.) inspires us to salute the red, white and blue, thanks to its retro-chic vibe and perfect fit.

Last Night's Look: Love It or Leave It?29 of 47 - Credit: Michael Simon/Startraks

ROSARIO DAWSON

As if the satin fabric, giant waist bow, massive slit and ankle-strap heels weren't enough, the actress adds dramatic elbow-length gloves to attend a Lambertz event in Cologne, Germany.

Last Night's Look: Love It or Leave It?30 of 47 - Credit: Mathis Wienand/Getty

ARIEL WINTER

Modern Family's middle child looks all grown-up in a fitted LBD, worn with a lucite Alice + Olivia clutch (from the line's new handbag collection!), Dana Rebecca Designs earrings, CB Luxe bracelet, a Graziela ring and Jean-Michel Cazabat heels to a Beverly Hills Paley Center event for Batman: The Dark Knight Returns, Part 2.

Last Night's Look: Love It or Leave It?31 of 47 - Credit: Todd Williamson/Invision/AP

MARY J. BLIGE

The singer offsets her on-trend simple white sheath with a gold belt, gray pumps and a bright blue Devi Kroell clutch at a Lifetime party for the Betty & Coretta premiere in N.Y.C.

Last Night's Look: Love It or Leave It?32 of 47 - Credit: Eugene Gologursky/WireImage

KRISTIN CAVALLARI

In her fiancé's hometown of Chicago for a Gillette event, Kristin shows off her fab post-baby figure in a sleek all-black look topped by a white boyfriend blazer and sparkling necklace.

Last Night's Look: Love It or Leave It?33 of 47 - Credit: Daniel Boczarski/Getty

ADRIENNE BAILON

Adrienne may be wearing a slashed lace number to a Valentine's-Day-themed event in N.Y.C., but we recommend this revealing look for advanced Valentine's celebrants (or those staying indoors) only.

Last Night's Look: Love It or Leave It?34 of 47 - Credit: Michael Simon/Startraks

DITA VON TEESE

At the same Germany party as Rosario, Dita does her own version of over-the-top glam in a chevron-print, draped golden gown and matching clutch.

Last Night's Look: Love It or Leave It?35 of 47 - Credit: Patric Fouad/Rex USA

ANNE HATHAWAY

The awards season darling hits the Producers Guild Awards red carpet in Beverly Hills, wearing an empire-waist Erdem dress with to-die-for golden sandals, Pomellato jewels and a swept-back do.

Last Night's Look: Love It or Leave It?36 of 47 - Credit: Jim Smeal/BEImages

TAYLOR SWIFT

Taylor's in those champagne sparkles she loves so much – but this time, her Elie Saab dress is mini, the cut is low and the Jimmy Choo sandals are barely there. Taylor (at the NRJ Music Awards in Cannes) is officially getting in touch with her sexy side.

Last Night's Look: Love It or Leave It?37 of 47 - Credit: Nicolas Gouhier/Abaca/Startraks

JESSICA ALBA

Another star showing acres of skin: Jessica, who dons a sheer lace Elie Saab Couture gown, then tones down the sex appeal with playful Casadei heels, a Roger Vivier clutch, Harry Winston diamonds and Day-Glo lips and nails.

Last Night's Look: Love It or Leave It?38 of 47 - Credit: Steve Granitz/WireImage

JENNIFER GARNER

Hey, she knows what she likes: The day before wearing Oscar de la Renta and Brian Atwood to the SAG Awards, the actress wears the same designers at the Producers Guild Awards in Beverly Hills.

Last Night's Look: Love It or Leave It?39 of 47 - Credit: John Shearer/Invision/AP

ALICIA KEYS

We don't know if we'd be brave enough to take on Gwyneth, but the bold star definitely does this Michael Kors cutout gown justice at the NRJ Music Awards in Cannes.

Last Night's Look: Love It or Leave It?40 of 47 - Credit: Aldo Verretti/Startraks

JULIANNA MARGULIES

The Good Wife star opts for classic elegance in her fitted vintage gown from Alexandra New York, black pumps and Fred Leighton jewelry, all worn to the Producer's Guild Awards in Beverly Hills.

Last Night's Look: Love It or Leave It?41 of 47 - Credit: FameFlynet

MICHELLE DOCKERY

The dress that the Downton Abbey star wears with Gianvito Rossi heels and Kwiat jewels to an Entertainment Weekly party before the SAG Awards has a whole lot more color and whole lot less side cleavage than the dress she ends up wearing Sunday.

Last Night's Look: Love It or Leave It?42 of 47 - Credit: Wise/PictureGroup

AMANDA SEYFRIED

Also at the Beverly Hills Producers Guild Awards, the actress dares to wear orange Roland Mouret against her pale complexion – and the risk pays off. She finishes the sunny look with Cathy Waterman jewels and Jimmy Choo heels.

Last Night's Look: Love It or Leave It?43 of 47 - Credit: Jeffrey Mayer/WireImage

KERRY WASHINGTON

Contrasting her angelic white Rodarte at the SAGs with this vixenish black lace number by Marchesa (plus a clutch by the line and Fred Leighton jewels), the actress goes full-on sexy at the Producers Guild Awards.

Last Night's Look: Love It or Leave It?44 of 47 - Credit: Picture Perfect/Rex

NINA DOBREV

The Vampire Diaries star is high on our list of stars with closets we'd like to raid – thanks in particular to this stunning draped floral number with a jeweled belt, spotted at the Entertainment Weekly pre-SAG bash.

Last Night's Look: Love It or Leave It?45 of 47 - Credit: Jason LaVeris/FilmMagic

KERI RUSSELL

Felicity who? The actress fêtes her new series The Americans in N.Y.C. wearing a white sleeveless top with an asymmetrical hemline, leather pants and sexy black heels.

Last Night's Look: Love It or Leave It?46 of 47 - Credit: Andrew Toth/Startraks

More Photos

Star Tracks

Jessica: Hip To It

Photo Special

10 Best Celeb Quotes This Week

StyleWatch Special

You Asked, We Found: Ginnifer's Earrings and More!