Sienna Miller

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We’ve talked before about what a difference a tent dress makes for a woman’s figure, as in totally obscures it. Since we’re pretty used to seeing Sienna Miller in floaty frocks, we didn’t think much of it when she arrived at the Late Show in a babydoll gray dress from her new line Twenty8Twelve. But our jaws dropped when she emerged from taping the show in a second-skin black Calvin Klein sheath dress and sexy high heels — va-va-voom! Who knew that body was hiding under all those layers? We totally relate to Sienna’s love of loose dresses, but we can’t help but wonder if she shouldn’t give them a break. Tell us: Which dress do you like better on Sienna? Should she stick to form-fitting dresses?

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As the weather gets hotter, we just want our clothes to get easier — and what’s simpler than a dress than can go day to night and requires the bare minimum of accessories? We’ve spotted Eva Mendes, Nicole Richie and Sienna Miller wearing smocked tube-dresses with great bold patterns and long sweeping hems. Just toss on a few bangles, a cool bag and comfy sandals, and you’re set! Dress it up for night time with jeweled flip-flops and an oversize clutch. The best part of these dresses is the smocking — unlike normal strapless dresses that tend to fall, these stay snugly on the bustline. Here are a few of our favorites. . .Tell us: Would you try a smocked sundress?

Get Eva’s Juicy Couture Dress, $198 at neimanmarcus.com.

Tropical Tube Dress, $23 at forever21.com

Mossimo Long Floral Halter Dress, $22 at target.com

L8er Smocked Strapless Floral Maxi Dress, $45 at macys.com

Roxy ‘Iris’ Print Tube Dress, $50 at nordstrom.com

Photo: splash news online; Richard Young/startraks

Sienna Miller has become known for being a fashion icon over the past few years, so it only makes sense that she would join the ranks of Sarah Jessica Parker, Kate Moss and the Olsen sisters in designing her own line. The added bonus is that her sister, Savannah, is actually a graduate of Central Saint Martins school of design in London and a fashion designer! The sisters have paired up to create Twenty8Twelve and instead of rolling it out with a big splashy fashion show, Sienna’s just started wearing the clothes — and who could be a better model? She wore her elegant little black dress to the recent Glamour Women of the Year Awards and her Gabrielle cotton camisole paired with jeans while strolling through London. We’ve got to say — so far, so good! We can’t wait to see the rest of the line in the fall. Tell us: Would you wear Sienna Miller’s clothing line?

Marion Curtis/Startraks; MJ Kim/Getty

Sienna Miller has been super-blonde verging on platinum for quite a while, due in no small part to her role as Edie Sedgwick in Factory Girl. But now for another role, this time in The Edge of Love with Keira Knightley, the actress has dyed her hair a dark caramel. We think Sienna is one of those rare lucky women who can probably pull off any hair color, but we want to know what you think! Tell us: Which color do you like better on Sienna? Platinum or caramel?

Click here to vote on more celeb transformations in the What’s Her Best Look Gallery!

Whether on the red carpet or running errands in L.A., Chanel has always been a favorite of Hollywood’s “it” girls. Mary-Kate Olsen even wrote an ode to her classic red Chanel bag. This season, stylish starlets are scooping up the Chanel 2.55 handbag in patent calfskin, white, black or ruthenium metal. Like all things Chanel, the flap bag doesn’t exactly come cheap. Sold exclusively at select Chanel boutiques, it carries a hefty price tag– $2675 to be exact (call 800-550-0005 to order). Luckily, you can get the look at SophiasReplica.com for a more reasonable $120. Tell us: Would you ever splurge on a real Chanel bag?

Photo: Sylvain Gaboury/FilmMagic; Earl/Field/Splash news online; FAME

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Even though she got her printed hoodie as a freebie at the Sundance Film Festival, Sienna Miller proudly shows her support for the Humane Society’s Protect the Seals Campaign. The clever slogan “Club Sandwiches Not Seals” is meant to bring attention to the many seals that are clubbed to death every year in Canada. Printed on sweatshirts like Sienna’s and polo shirts, the Humane Society uses 100% of the profits to raise awareness about the cruelty facing Canada’s seals. For Sienna’s sweatshirt, $50, click here and for other seal campaign t-shirts, including the new “Seal the Deal” campaign logos, click here. To find out more about Canada’s cruel seal hunt visit protectseals.org. Tell us: Would you wear this sweatshirt?

Photo: ATR/FINALPIXX

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Do not readjust your sets — these bold black and white lines are supposed to be there. With their off the shoulder or asymetrical neckline and graphic impact, these dramatic dreses are a mash-up of the ’80s glam revival and the 60’s mod trend of the past year. From Sienna Miller’s Calvin Klein to Gwen Stefani’s L.A.M.B to Thandie Newton’s Giles Deacon dress, the trend is making a big statement on some pretty big style icons. In all fairness, it’s not the the easiest trend to pull off (remember what your mother told you about horizontal stripes not being flattering?) but a sharp silhouette and minimal accessories is definitely the way to go. Tell us: Is this a trend you’d try?

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: Andrew H. Walker/Getty; Ethan Miller/Getty; Vince Maher/WENN

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