The always fabulous Kimora Lee Simmons attended the Emerald Ball in London last night wearing a real gem of dress: A glitzy Jenny Packham halter gown that showed off her sexy postbaby cleavage. To temper the provocative neckline, she accented her updo with a vintage-inspired jeweled accessory. 

The mother of all moguls comes back to Style with a new season of Life in the Fab Lane early next year. In the meantime, check out what else she's been up to in the Spotlight: Style Network Stars gallery!

She speaks! Good Morning America aired part of Rihanna's sit-down with Diane Sawyer today. The full interview will be shown on 20/20 tomorrow night. The clip marked the first time the public had heard the singer address what happened on that ill-fated night that left her badly beaten by ex Chris Brown. 

Unlike the silly bow tie that Chris wore on Larry King Live to not tell his side of the story, Ri-Ri looked beautiful and poised in a dress that let the world know that she was doing fine. The frock's bold shoulders suggested that she was a stronger woman as a result of the ordeal, while the white hue conveyed a sense of clarity and a new beginning. 

Keep reading to hear Rihanna's advice to young women who feel trapped in abusive relationships.

No, Lady Gaga did not dress as a Marc Jacobs model risen from the dead for Halloween. This is actually what the singer wore to accept her Stylemaker award at the Accessories Council Excellence (ACE) Awards.

So what's the message? Throw on the craziest things you can find and you'll be rewarded for it? Apparently.

But Lady Gaga is starting to bore us with her in-your-face getups. She made underwear as outwear so popular that it became a major spring trend on the runways. The only difference between the Marc Jacobs lingerie she wore on last night's carpet and the look shown on the catwalk was the explosion of talcum powder.

Then there's the extreme afro, another one of Jacob's eccentricities from spring fashion week. Remember the Louis Vuitton show? The Erickson Beamon lace face is also very LV, circa 2008.

Basically, the only part of Gaga's outfit we did like were those John Galliano colored pearl heels.

Maybe next time she'll wear a simple, ladylike dress with understated jewelry and shock us all.

Last Friday, Michelle Obama appeared on The Jay Leno Show wearing one of our favorite dresses in her wardrobe: the rose-print Thakoon dress she debuted at the first presidential debate more than a year ago. 

She was there to answer questions for the "Ten at Ten" segment. No, Jay didn't ask any fashion-related questions, as we would have liked—unless you count what daughters Malia and Sasha would be wearing for Halloween. (She said that was top secret!) Still, it was so wonderful to learn that Michelle had a terrifc sense of humor on top of an impeccable fashion sense. ("We don't have enough time," she joked, when asked about Barack's most annoying habit.) Plus, we enjoyed seeing her flash that gorgeous smile of hers the entire time. 

Watch the clip above to see what we mean. Then, visit mystyle's Michelle Obama: Shop Her Style! gallery to get the look of her lovely Thakoon dress for just 30 bucks!

Ever since that ill-fated night when she was attacked by ex-boyfriend Chris Brown, Rihanna seems to be tapping into her dark side with her look. She's gotten a gun tattoo, rocked vamp lipstick and disturbingly steps out without a bra on—in fact, the only thing that isn't dark about her appearance is her frosted hair.

The most recent instance of Ri-Ri acting out through fashion (or lack thereof)? The cover of her new single, "Russian Roulette," which hit the airwaves today. It shows the Good Girl Gone Bad topless and covered in barbed wire. Our nipples hurt just looking at it!

Something tells us the star will be flirting with nudity for a while. Her fourth studio album, out Nov. 23, is called Rated R, after all.

For more pics of Ri-Ri leaving little to the imagination, visit our new Rihanna's Flashin' Fashion gallery!

Everyone's favorite trainwreck, Lindsay Lohan, showed up unfashionably late to her progress hearing in Beverly Hills this morning. She was summoned by the court for an update on her probation, relating to her 2007 DUI arrest.

There are so many things wrong with her look, but we can't get over the fact that she thought it was OK to go before the judge wearing a studded blazer!

What do you think is the worst part about LiLo's appearance? Sound off in the poll below!

Chicago may have lost out on its bid to host the 2016 Olympics, but at least the first lady represented her hometown well! Michelle Obama (shown posing next to Prince Albert of Monaco), along with the president and Oprah Winfrey, attended the opening ceremony of the 121st IOC Session in Copenhagen wearing a luminous burnt-gold cocktail dress with fitted bodice and full pleated skirt. A trio of brooches at the neck of the frock highlighted Michelle's beautiful smile.

Click over to mystyle's Michelle Obama: Shop Her Style! gallery to get the golden look!

Today is supposed to be an auspicious day—it's 9/9/09. And yet, we've awakened to some news that makes it feel more like April Fool's Day. First, there's the announcement that Lindsay Lohan is the new artistic adviser over at Emanuel Ungaro. Yeah, we gasped, too. She of the shredded leggings, dressing-under-the-influence style of garbing is now advising a major house on what to design for—gulp—us. And at last night's GQ Men of the Year awards in London, Lily Allen showed up in one of our favorite designers: Chanel. Not only did she ruin a perfectly good dress by showcasing her undies, she served as a visual reminder that she's the face of Chanel's handbag line. It hurts. Can we now just go back to bed?

Welcome back, Carrie! New York City just got a lift, thanks to the reemergence of Sarah Jessica Parker, who was spotted sauntering in her summer whites while shooting Sex and the City 2. We're loving everything about this look: the billowy feel of the dress, those shiny Christian Louboutin pumps (shhh…don't tell Manolo!), the statement necklace, and best of all, the gleaming Chanel purse. Hot fun in the summertime, indeed.

Get Carried away some more in our SATC Style Rewind gallery, then go to the Manolo Mafia gallery to see street scenes from the first movie and read what we thought should have happened.

In a word—dreamy. We haven't always loved Milla Jovovich's red carpet looks, but we have to hand it to her: She sure does make a beautiful bride. Draped in a romantic Temperley London gown, Milla married the father of her 21-month old daughter, Ever Gabo, Resident Evil director Paul W.S. Anderson, who smartly suited up in khaki and white. The couple tied the knot on Saturday at their home in Beverly Hills, exchanging matching classic Neil Lane gold bands—all the better to go with her 19th century vintage gold engagement ring studded with colored pink, yellow and white diamonds, which, from the looks of it, also matched her bouquet! Here's to a long and stylishly coordinated life together!

Michelle Obama has never presented herself as a conventional first lady, so it's no surprise she went so cazh while traveling on vacation. Still, everyone seems to have an opinion. We're of two minds: Hey, if she wants to throw on a pair of khaki shorts and pin up her hair in a bun, why shouldn't she? Her husband is the leader of the free world—emphasis on free. Then again, we're all about savvy travel style. (Check out the Jet Set Style gallery featuring celebs en route.) The last time we flew across the Atlantic, we left the jeans in a suitcase.

So what do you think? Was Mrs. O off base in showing her thighs? Take the poll below, then shop her more stellar style in our extensive gallery!

Hallelujah! A photo of Michelle Obama in which her outfit isn't partially blocked by a podium, mic, crowd or that darn husband of hers! The first lady arrived at the reception for newly sworn-in Supreme Court Justice Sonia Sotomayor wearing a dotted ivory dress that she punched up with splashes of turquoise, including a short-sleeve cardi, an Erickson Beamon starburst brooch and beaded bracelets. Her trusty black kitten heels completed the look. Lovely! Here's hoping we can call out every single part of her glorious ensembles more often.

Check out mystyle's Michelle Obama: Shop Her Style! gallery to get the look.

The Kardashian girls—(from far left) Kylie, Kendall, Kim and Kourtney—hit up the Teen Choice Awards last night. (Khloé was enjoying some downtime before heading out on a promotional tour for her new show with Kourt.) The occasion marked the first time the little ones attended the ceremony. How'd they do?

Kylie, who turns 12 today, wore an LWD that she toughened up with a multiple chain necklace and leather jacket. Perfect for a date, but not the red carpet. Kendall, 13, reminded us of Selena Gomez. That's code for: She looked perfect! The one-shoulder black dress, the black-and-white polka-dot pumps, that hairdo...ADORABLE! 

The next best dressed Kardashian was Kourtney. The oldest sis looked summertime fresh in a vibrant mosaic-print frock and nude heels and carrying an aqua clutch. But as usual, all everyone could talk about this morning was Kim, Kim, Kim! She went blond—for real this time! With that gorgeous face, she could probably pull off any hair color, but we like how her natural jet black locks give her an exotic flavor. The plunging white Stella McCartney dress and silver Gucci heels weren't doing it for us, either. The entire package made her look too much like...

When we first came across the latest cover of Elle, we thought: How sexy! The leather is certainly on trend and, sure, Jennifer Aniston has that retouched Stepford Wives patina, but girlfriend looks good. It's hard to believe she just turned 40!

But then we saw this inside shot...

Eva Mendes had yet another launch party at Macy's for Vida, her line of bedding. It's rated well, so if that acting thing doesn't pan out, she won't exactly starve. When it comes to endorsements, Eva's already got animals and nudity (PETA), fragrance and nudity (Calvin Klein), cosmetics (Revlon) and haute couture BFFs (Dolce & Gabbana) covered. What's next? 

Here's an idea. This vintagey floral flock reminds us of a pot holder! So how about a line of kitchen linens, pots and spices, the not-so-subtle message being that you, too, can cook up something hot, even if you don't exactly look like Eva Mendes. 

Tell us what you think of Eva's look!