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

PEOPLE.com officially endorses this outfit. At a reception for heads of state in London, the fashionable stuns in a white jacket with silver embroidery over a chiffon pleated skirt, both by J. Mendel, plus coordinating pointy-toe heels.

One of Narciso Rodriguez’s supports the designer at a private lunch at Barneys in N.Y.C., wearing his bold creations from head to toe.

We think Effie Trinket would be proud of all the color in the actress’s ensemble, from her bright Tucker dress to her red Coach cross-body. She finishes her outfit with Dannijo jewels, all worn to a Beverly Hills designer preview.

She’s got a , a handbag line and a baby on the way, but that’s not enough for this model! Camila celebrates her role as brand ambassador for INC International Concepts in a curve-hugging dress and T-strap heels, both by the Macy’s line, in N.Y.C.

Also at the Beverly Hills designer preview, the TV host makes leather shorts look surprisingly breezy, wearing her Madewell pair with a silky top, a Dannijo necklace and a pastel Coach clutch.

Another Knowles girl steps out in braids (was she inspired by her sister?), wearing hers long with a graphic-print Diane von Furstenberg wrap and super-pointy heels at the Camila McConaughey I.N.C. event in N.Y.C.

Here’s another whimsical print we’d like to see take flight: the Dallas star’s pretty, butterfly-emblazoned Tucker skirt, worn with Dannijo jewelry, a Coach clutch and VC Signature sandals to the Beverly Hills preview party.

After two days of simple black shifts, the mixes things up in an abstract, formfitting black-and-white tank dress, accessorized with seriously chunky peep-toes and a bare face to the Warner Brothers pre-Olympics party in London.

Red, white and ooooh! The wears a printed Tucker dress with navy-and-white striped wedges, a Dannijo necklace and red lips to the Beverly Hills designer preview.

Also at the designer event in Beverly Hills, puts her own funky spin on simple basics, pairing a flowy dress with a neon Dannijo necklace, a preppy Coach clutch and shoes that leave us at a loss for words.

We’ve been hoping that the would switch up her footwear, but we didn’t see this coming. The royal kicks off her shoes and lets her gray-and-white plaid A-line dress take center stage at a pre-Olympics event in London.

Work, cover girl! To fête her cover of Gotham magazine in N.Y.C., the actress wears a draped, collared shirt with a printed skirt, lace-up Roger Vivier heels and a swept-back do.

The temp in N.Y.C.: 90 degrees, meaning that is taking warm-weather leather to scorching new levels with her slim greige Current Elliott pants, to which she adds a silvery top and T-strap heels (both by Vince Camuto) for a GenArt screening of Hit and Run.

The perpetually fashionable New Yorker brings her chic city style to Verona, Italy, wearing those scalloped shorts we all love so much, plus a sheer top and bow-topped pumps for an Intimissimi event.

Some shirtdresses look like a button-down borrowed from your guy’s closet. This sexy shirtdress most definitely does not. Whitney wears a version with sheer horizontal stripes and adds strappy sandals and a white clutch for the Vans Women’s Classics Stylist Dinner in Los Angeles.

You didn’t think the allover sequin trend was going anywhere, did you? sparkles in her second LBD in two days and matching ankle-strap sandals at a fund-raiser in London.

Our favorite part of this ensemble? The actress’s snakeskin-print pumps. She dons them with a two-toned black frock for the Population Services International 2012 awards in Washington, D.C.

Jewel tones never go out of style, something Tia obviously knows, considering she selects a vibrant bluish-purple Christian Dior dress (simply accessorized with with a black belt, Dannijo earrings and Q by Pasquale heels, plus a wavy do) for the NBC TCA press tour in Hollywood.

Last week we were obsessing over her demure top, now we’re obsessing over Olivia’s demure embellished white dress (it fits her so well!), which she wears with a purple clutch, Neil Lane jewels and pink Sole Society peep-toes to the L.A. premiere of The Babymakers.

To celebrate the launch of Karl Lagerfeld’s new collections in London, the wears the designer’s go-to color – black, in the form of a simple LBD – plus a pair of peep-toe ankle booties.

At the NBC TCA press tour in Hollywood to promote her new show, Guys with Kids, the actress is a woman with style, as proven by her textured Erin by Erin Fetherston LWD featuring a sexy V-neck and a metallic waist-cincher.

More flower power to Nelly, who attends a Self party in N.Y.C. sporting a conservative floral frock with fashion-forward black cage heels and an attention-grabbing white mani-pedi.

Is Susan wearing jail stripes because she knows she’s breaking all kinds of style rules? That’s what we assume after seeing the black-and-white top over a button-up and black pants she dons at the Ai Weiwei: Never Sorry N.Y.C premiere.

Looks like the singer is jumping on the warm-weather leather bandwagon. She attends the Big Apple Self bash in a cutout second-skin dress with contrasting ribbonlike embellishments that leaves little to the imagination.

Sexy one night, sweet the next. The versatile wears something Rachel Berry would surely approve of to the FOX TCA All-Star Party in West Hollywood: a ruched, flowing powder pink Emilio Pucci dress with matching Brian Atwood heels, a Le Vian ring and a girlie braid.

Meanwhile at the same West Hollywood bash, fellow FOX actress sticks to her favored silhouette, wearing a golden Paule Ka dress with a fitted bodice and flared skirt, plus simple black pumps.

When we picture a maternity dress, this is not what comes to mind! At an N.Y.C. Cinema Society screening of Killer Joe, the expectant mom stuns in a teal-and-cobalt bandage dress and T-strap pumps, both by I.N.C.

Another shows off what she’s got in a short-sleeve, hot pink mini, worn with blue lace-ups and a funky hairstyle to the L.A. premiere of The Watch.

Yet another of FOX’s “All-Stars” steps out for the fiesta in West Hollywood, sporting a floral-print one-shoulder sheath, oversize golden earrings and sexy sandals.

The only thing not funny about Mindy? Her seriously stylish black-and-white printed dress, which she ices with jeweled sandals and drop earrings at the FOX party in West Hollywood.

For the N.Y.C. screening of Killer Joe, it’s appropriate that the actress is killing it in a black-and-white sheath with a Peter Pan collar, peep-toe platforms and a bubble gum pink pout.

Joining her Fox fam at the West Hollywood bash, the New Girl actress gives the impression of being an old pro on the circuit thanks to an ikat-print blue-and-yellow frock, black Sergio Rossi platforms and silver danglers.

To let her red silk shirtdress shine, the socialite smartly sticks with simple black accessories including an oversize clutch and illusion pumps for the Killer Joe screening in N.Y.C.

Never one to play it safe on the carpet, the takes a fashion risk with a lace bustier and a tie-dye skirt topped off with a fringe jacket at a Guess party in Ibiza, Spain.

Perhaps the favorite leather leggings are at the dry cleaner? She flaunts her famous curves in a printed sheath, plus pointy-toe heels, to host the Midori Beachside Bash at the Delano Beach Club in Miami.

No fashion regrets here! At the Valspar Hands for Habitat Celebrity Auction press conference in N.Y.C., the Glee goes girlie in an Oscar de la Renta frock and black Versace pumps.

Lea’s fellow Gleek wears a similar silhouette but plays with prints in a cap-sleeve number, plus funky T-strap sandals, at a photo call during the Giffoni Film Festival in Giffoni, Italy.

Sporting the color we deemed the hottest shade of summer last week, but in an expected way (on formfitting pants), the Mad Men star adds a sky-blue shirt, a graphic Corey Lynn Calter clutch and a statement ring for the Los Angeles Struck By Lightning premiere.

In New York City to perform in Uncle Vanya at Lincoln Center, the lives up to that title in a black Givenchy by Riccardo Tisci dress with an asymmetrical print, a bright clutch and Roger Vivier booties.

Modern Family’s eldest child looks all grown up in a little red Ted Baker dress, nude peep-toes and a simple necklace at the Struck by Lightning premiere in L.A.

Hopefully, what happens in Vegas doesn’t stay in Vegas. Because we’d like to see Giuliana’s one-shoulder black frock and sparkly shoes, which she wears to receive the beautiful humanitarian award at the 2012 North American Hairstyling Awards, become a nationwide fashion trend.

The actress attends the Together to End AIDS amfAR benefit in Washington, D.C., looking all business in a structured red shift with an ivory blazer and neutral accessories.