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The new Chloe boutique in Los Angeles may be opening on Melrose Ave., but the celebration was so big, it had to be held at a Hollywood studio! Hosted by Kate Bosworth and Chloe Sevigny, both dressed in the French brand head-to-toe, the party brought out a bevy of celebs to Milk Studios on Thursday night, from Leighton Meester and beau Sebastian Stan to Molly Sims, Zoe Saldana, Jamie-Lynn Sigler, Rachel Zoe and Bosworth’s model/boyfriend, James Rousseau. And why all the love for Chloe? “They have a lot of statement pieces, whether it’s a bag, or a blazer, there’s always a bit of flare and edge to everything,” Sigler told PEOPLE.com, herself dressed in a black blazer with a beaded lapel. But the line’s cut out dresses were the hit of the evening, seen on Saldana, Sevigny, and Meester. But for Meester, the decision was all about taking advantage of the warmer West Coast. “I’ve been in a perpetual winter for like an entire year in New York, so I was like I don’t care what it is I’m going backless, I’m going pantless, we’re doing it tonight! ” the Gossip Girl star enthused. And for Chloe fans in always-sunny L.A., that kind of summer-ready style is clearly something worth celebrating. - Shruti Dhalwala

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Despite the chilly New York temperature, stars like Sarah Jessica Parker, Kate Bosworth, Kim Raver, Eve, Helena Christensen and more turned out to celebrate Chanel’s Mobile Art venture with designer Karl Lagerfeld situated in Central Park. The launch of the contemporary art exhibit, designed by architect Zaha Hadid, featured a star-studded guided tour through the park directed by legendary French actress Jeanne Morreau. Although the party took place outside, SJP and Kate didn’t let bulky overcoats ruin their beautiful Chanel dresses, which pleased the designer himself. “Those girls are really strong girls — they stayed there nearly naked though it was icy cold,” Lagerfeld told PEOPLE. “They didn’t care, they smiled, they laughed. I admire them because we [men] are cowards.” For SJP, it was just another part of the job. “I’m so accustomed to wearing little bits this time of year,” she told PEOPLE. “I did it for the last ten years of my life [namely playing Carrie Bradshaw on Sex and the City].” And while we’re no fans of the cold, freezing in the name of Chanel seems worth it. Click here to learn more about the Mobile Art exhibit in Central Park.

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We’ve been seeing outrageous star fashions all over Hollywood recently. And when Kate Bosworth first stepped out in these funky Chloe wedges at the beginning of the month while promoting her new movie 21 we thought they were a little questionable. Kate, however, is known for pushing the fashion envelope and made them seem totally cool. Then this weekend, Heidi Montag followed in the fashionable star’s footsteps, sporting the $750 patent wedge booties while promoting her clothing line, Heidiwood, at Kitson in L.A. — and we can’t say we loved the look quite as much on her. The shoes somehow seem a little too “high-fashion” for the Hills star. But we want to know what you think. Tell us: Who rocks the designer heels better: Kate Bosworth or Heidi Montag? Would you wear them?

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As if starring in the number one movie in America with a hunky co-star isn’t enough, Kate Bosworth got an extra bit of good luck in the form of a gorgeous purse! Jeff Ma, the real-life inspiration for Jim Sturgess’s character in 21, became close friends with Kate over the filming of the movie and gave her a special good luck gift right before the film’s Vegas premiere — this Surly Girl “Malibu Day Bag”, made of hand stamped python. Now, most of us really would have to hit it big at blackjack to afford the bag’s $1050 price tag, but it looks like Kate’s already hit the jackpot! If you’ve got the chips, click here to get the bag for yourself at shopsurlygirl.com.

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For years it’s been touted as the number one rule for dressing slimmer: avoid horizontal stripes. But stars all over size-obsessed Hollywood have been sporting it recently on shirts, tees — and even full dresses. Since we love the look on the celebs like Cameron Diaz, Jessica Biel and America Ferrera, featured in our new Stars in Stripes gallery, we’re really considering adding it to our spring wardrobe with a sailor shirt or two. But we want to know what you think! Tell us: Would you wear horizontal stripes?

David Sims

Kate Bosworth has gone from fashion plate to pin-up, as the latest cover girl for Calvin Klein Jeans. Announced yesterday, it’s the first global campaign for Bosworth, 25, who up until now has only modeled for Coach in China. The ads aim to feel “clean, pure and simple all-American,” said Malcolm Carfrae of Calvin Klein tells WWD. And despite the fact Bosworth is used to looking stunning on the red carpet, the starlet claims getting in front of the camera can be awkward. “It’s funny, I definitely feel much more uncomfortable modeling because it’s not something I know how to do,” Bosworth told Nylon Magazine. “When I act, I’m not aware of the camera; I’m just there with the actor in that moment. As a model, you’re very aware of the camera. What I enjoyed most about doing this campaign was finding and becoming a certain character. I think working with people like [photographer] David Sims and [stylist]Karl Templer, who want to find and shape that character, instead of simply capturing a pretty picture, is really exciting. So, this campaign was a little bit like an acting job in that way.” From what we’ve seen, we say it’s a job well done.

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For last night’s 7th on Sale Black Tie Gala to benefit the CFDA-VOGUE Initiative for HIV/AIDS, Vogue editor in chief Anna Wintour — along with co-chairs Diane von Furstenberg, Marc Jacobs, Ralph Lauren, Kenneth Cole and Top Shop — brought out the best of fashion, with everyone from Valentino to Mary Kate and Ashley Olsen to Kate Moss stopping by for dinner and a ton of major shopping. With donated designer goodies up for sale at heavily discounted prices — everything from Balenciaga bags to baby beds — the 69th Regiment Armory in New York filled with exquisitely dressed stars and their favorite fashion designers. Calvin Klein’s Francisco Costa raved of Ashley Olsen (in a clinging white gown by the designer), “She has the perfect body . . .she’s super-sexy.” And Gossip Girl Blake Lively confided of her stunning yellow gown that “Michael [Kors] was so involved. He told me which way to wear my cuff, with the owl facing outwards. Jack McCollough from Proenza Schouler escorted muse (and dessert chair) Kate Bosworth and told PEOPLE that “It’s good to dress friends . . . It’s easy,” while Kate demurred that she “was very lucky to wear it.” But not everyone brought their dress designer as their date — honorary chair Jennifer Connelly brought husband Paul Bettany who drolly remarked on shopping, “I live for it.” For those of us who really do live to shop, make sure to check out the selections from the event on eBay by clicking here.

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Ah, finally a trend made for the weekends! Jennifer Aniston, Kate Bosworth and Ashley Olsen are just a few of the stars we’ve spotted in a classic casual combo — plaid buttondowns paired with jeans. And there are so many options, from urban black & white combos to classic red-based patterns — and you can pick between skinny jeans like Ashley, wide-leg jeans like Kate or bootcuts like Jennifer! Here are a few of our favorite plaid shirts online to fit any budget:

Women’s Plaid Camp Shirts, $10 at oldnavy.com

Baby-pleat plaid shirt, $45 at gap.com

Kimchi & Blue Ruffle Front Shirt, $48 at urbanoutfitters.com

McQ By Alexander McQueen brown plaid ruffle snap front shirt, $135 at bluefly.com

7 for all Mankind Brushed Plaid Peasant Shirt, $155 at eluxury.com

Bell Fan Sleeve Plaid Shirt, $198 at saksfifthavenue.com

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We covet anything Kate Bosworth wears — whether it be on the red carpet or while she’s just strolling around town. Most of her designer-packed wardrobe is too pricey for us to snag, but the fashionable actress does wear her fair share of affordable pieces. Remember her $18 striped summer dress? For the past month, Kate has been getting into the fall spirit with these comfortable and light Gap sweaters. Her heather and white striped number was part of Gap’s pre-fall collection, but you can still get a similar darker striped one for just $45! Like a true fashionista, Kate got her hands on Gap’s cashmere line way before it hits stores. Her canary yellow cashmere v-neck, $98, will hit Gap stores by November 15th, but in the mean time try this similar style cotton sweater, $40. Why stop there? You can get Kate’s whole look at the gap! Tie Gap’s red ruffle scarf, $13, around your neck and get a pair of Gap’s signature dark wash skinny jeans, $60, to finish it off. Now that is celebrity style we can relate to!

Peter Kramer/Getty, Humberto Carreno/Startraks, Dara Kushner/INF

It’s shaping up to be a colorful fall! We’ve already seen turquoise and purple dresses on our favorite stars, and now some of Hollywood’s hottest ladies are stepping out in hot pink! Try one out for daytime, like Jessica Simpson’s Karen Zambos Vintage Couture sheath. Or try the the trend at night in a minidress like Kate Bosworth’s Preen or strapless like Marley Shelton’s Calvin Klein. Here are a few of our favorites:

Get Jessica’s dress, $405 at karenzambos.com

Smocked bust dress, $17 at wetseal.com

Crochet Trim Jersey Knit Dress, $118 at bebe.com

Houndstooth Burnout Tunic, $148 at ardenb.com

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Who else could pack a front row with Kate Bosworth, Julianne Moore, Ashley Olsen, Rosario Dawson and more? Calvin Klein, of course! The stars turned out to see a typically minimalist collection from the house’s designer, Francisco Costa — and judging from the enthusiastic responses and clapping, they loved it. Rosario told PEOPLE that “I love the colors. I love the material of the dresses. Specifically, I really loved the architecture of the dresses. There were a lot of sort of panels on the top, things that made certain parts of the body more sheer than others, really long slits on the sides. But just like really simple, really cool things like that architecturally, I love that in clothes.” And we love seeing such a simply chic front row!

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Kate Bosworth’s style tends to be impeccable — and way too expensive for us to even think about copying, like her recent Jil Sander dress. So we were thrilled to see Kate in a dress that is totally affordable! Kate hit the streets of L.A. this week in a Libertine for Target (one of their famed GO! collections) Striped Tunic Dress that is only $18. What could be better? Either buy it one size up so it’s loose like Kate’s and belt it, or get it in your size for a sexy and snug fit. Check out other great pieces from the Libertine collection like this Crepe Dress, $40 and this Eyelet Apron Cami, $30. Get Kate’s dress on target.com, $18.

Katie Holmes is not the only star stepping out in the Gap. While vacationing in Hawaii recently, Kate Bosworth hit the beach in an adorable Gap Body bikini. We love when we can actually afford to indulge in star style — and this ring bikini fits the bill. Get Kate’s tortoise shell square ring halter top, $33, at gap.com and the matching bikini bottoms, $33, also on gap.com. If only her Prada dress from the Costume Institue Gala was as affordable!

Click here to see our Ultimate Guide to Summer Style. Everything you need to beat the heat — from the hottest shoes to the coolest shades and the sexiest bikinis!

Photo:Johnstone/Binns/Pacific coast news

We know that hats are usually part of traditional Derby Day outfits, but we are still a little confused by Kate Bosworth’s unusual headgear that she wore to the Victoria Derby Day in Melbourne, Australia over the weekend. We can’t help thinking that it looks an awful lot like something Cher would have worn in the 80’s, and it’s a little late for a Halloween costume. Tell us: What do you think of Kate Bosworth’s headpiece? Would you ever wear it?

Photo: Paul McConnell/Getty

The fashion world is a buzz about a new look for fall. It’s all about The New Volume(!), or what non-industry folk like to refer to as oversized clothing. Kate Bosworth, who is generally stylish and always beautiful, is one of the first stars to embrace the trend, recently wearing a Lanvin dress that has been ooh-ed and ahh-ed over in many a fashion magazine. I just can’t help but think that it looks like she’s dressed in a hot air balloon instead of clothing. It’s too much fabric for one little body, but on the other hand, could anyone larger than Kate possibly wear it without looking like they are in their final trimester? This is one trend i’ll be sitting out, as comfortable as it does look. Something tells me that this is just the beginning; we’ll be seeing many other trend-setting starlets test out this trend this fall and winter. What do you think? Would you wear this look? — Melissa Liebling-Goldberg

To other dresses worn by your favorite stars click here

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