Us’ Makeovers of the Year!

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Michelle Obama

Once her husband took office, the First Lady transitioned into a style icon, helping young designers like Jason Wu (whose design she chose for the Inaugural Ball) get noticed. "If I can have any impact, I want women to feel good about themselves and have fun with fashion," she has said.

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Michelle Obama

Long gone are the days of monochromatic shapeless suits! Mrs. Obama now embraces vibrant colors and shoulder-bearing sheaths. "She has beautiful shoulders!" designer Jason Wu told Us of the First Lady (wearing Michael Kors in her official White House portrait).

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Anne Hathaway

As Hathaway's style evolved, she was comfortable taking edgy fashion risks that didn't always hit the mark.

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Anne Hathaway

"You deserve to take the way you look seriously," the Rachel Getting Married actress (here in 2008) has said. "I've made dressing an intellectual game."

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Anne Hathaway

Channeling old Hollywood glamour in Armani Prive at the 2009 Oscars, "[Anne is] more glam this year, more Audrey Hepburn," her makeup pro Julie Harris tells Us.

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Kate Winslet

Oscar winner Winslet was drab in a shiny metallic, oversized, taffeta floor-sweeping Gucci gown at the 2007 British Artist of the Year Awards.

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Kate Winslet

At the start of her style transformation, the actress looked stunning in an asymmetrical, curve-hugging Balmain dress at the L.A. premiere of Revolutionary Road. "In your thirties the [style] anxiety you had in your twenties sort of leaves without you noticing," she tells Us.

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Kate Winslet

Rocking her hot bod in a curve-hugging Narisco Rodriquez gown at the Screen Actors Guild Awards last January, Winslet says her children inspired her style. "Maybe I'm more physically confident after having children," she tells Us. Winslet's fashion motto: "Whatever fits, whatever works!"

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Jennifer Lopez

Sporting formed updos and bronzed skin, Lopez (here last January) was comfortable with her signature look.

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Jennifer Lopez

"I don't think [Jennifer] set out to make a change or fit a trend," hairstylist Ken Paves tells Us, "she's just always ahead of the curve."

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Jennifer Lopez

Mom to twins Max and Emme, Lopez's fashion philosophy has morphed into a look of elegance and simplicity. "She's always had confidence, but this is confidence with an easiness", her makeup artist Scott Barnes tells Us.

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Jessica Biel

In the past, the tomboyish actress (who once named soccer player Mia Hamm as her fashion icon) garnered more praise for her hot body than her style savvy.

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Jessica Biel

"She's becoming a woman," makeup artist Brett Freedman tells Us of the star, who currently dates Justin Timberlake. "Her look is more polished."

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Jessica Biel

"I feel like a kid with saucer eyes, soaking it all in and having the time of my life," Biel (in Oscar de la Renta) has said about fashion.

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Tina Fey

Finally ditching her trademark specs, Fey (mom to Alice, 3) begins her journey into the fashion world with a newly-hired stylist.

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Tina Fey

Geek chic! After seizing the spotlight with her Sarah Palin sketches on Saturday Night Live, the self-professed "nerd" proved brainy is beautiful.

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Tina Fey

After hiring her first official stylist, Anna Bingermann, who dressed her in edgy labels like Zac Posen, "[Tina's] the girl next door who got hot!" says her makeup pro Gita Bass.

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Kim Kardashian

Never one to shy away from bright colors and revealing ensembles, Kardashian (who co-owns the Calabasas, Calif., boutique Dash with sisters Kourtney and Khloe) embraced a flashy style.

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Kim Kardashian

"Everybody needs a change. I like this side of me that's more conservative," the reality star tells Us.

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Kim Kardashian

The curvaceous beauty ditched the sex-kitten look for a revamped wardrobe of sophisticated and ladylike pieces, including this Narciso Rodriguez number. "I used to think fake eyelashes and tight dresses were hot", she tells Us, "but I'm into a more classic look now."