This Week's Hottest Hair

Reese Witherspoon, Kim Kardashian and more prove that getting glam is all about the hair! Get inspired by this week's most stylish dos – then click to find your best hairstyle. By Katherine Kluznik Rentmeester

REESE WITHERSPOON

Jeffrey Mayer/WireImage

For the L.A. premiere of Four Christmases the actress channels Grace Kelly, shaping her bob into a classic waved coif.

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KIM KARDASHIAN

Jacob Andrzejczak/WireImage

The Dancing with the Stars alum adds lush and loose curls to her center-part do at a Vegas magazine party in Sin City.

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JESSICA BIEL

Dee Cercone/Everett

The star adds soft, tousled waves and a side part to her hair for the CNN Heroes ceremony in Hollywood.

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RIHANNA

Andy Fossum/Startraks

It’s all about turning up the volume for the singer, who amps up her short style with soft texture at the American Music Awards.

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NICOLE RICHIE

Jason Merritt/FilmMagic

The star goes for an updated shag style with wispy bangs at the UNICEF Snowflake Lighting event in L.A.

Give yourself a new look with InStyle.com’s Hollywood Hair Makeover.

MADONNA

Evan Agostini/AP

The Material Girl adds retro waves and a soft side part to her blonde locks at the Gucci UNICEF dinner in N.Y.C.

Give yourself a new look with InStyle.com’s Hollywood Hair Makeover.

NICOLE KIDMAN

Brian Ach/WireImage

The blonde adds elegant large curls to her long locks for an appeaance on The Late Show with David Letterman.

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MOLLY SIMS

Entertainment Press / Splash News ONline

Giving her updo a romantic look, the actress pulls select locks loose to frame her face at the CNN Heroes event.

Give yourself a new look with InStyle.com’s Hollywood Hair Makeover.

JADA PINKETT SMITH

Fotonoticias/WireImage

The Madagascar 2 star hits the film’s Madrid premiere with chic, new blunt bangs.

Give yourself a new look with InStyle.com’s Hollywood Hair Makeover.

Check Out Last Week’s Hottest Hair >