Top 10 Straight Hairstyles

Heidi Klum

Back on the market, Heidi Klum is rocking some seriously flirty hair. Her slightly messy styling adds understated sex appeal to an otherwise simple and polished style. For a look like Heidi's without the hassle, invest in an at-home straightening treatment like Bumble and Bumble's Concen-Straight smoothing treatment ($45), for more manageably straight hair.

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Photo: © Frazer Harrison/Getty Images

Rachel Bilson

No hairstyle better lends itself to accessories than shiny, straight locks. Take a page from Rachel Bilson and top your sleek 'do with of-the-moment pieces, like this boho hair band.

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Photo: © John Sciulli/Getty Images

Viola Davis

This Critics' Choice Award winner does the Justin Bieber better than the Biebs! Short hairstyles get a modern update with the addition of long bangs and a wispy blowout. Who knew crops could be so sexy?

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Photo: © Steve Granitz/Getty Images

Elizabeth Olsen

The youngest Olsen is schooling her sisters in style this year. Not only can she dress, but Elizabeth is always camera-ready with bouncy blowouts and high volume hair. The key to light reflecting locks like Liz's: Add a dime-sized amount of Dove's Shine Cream-Serum ($3.76) to wet strands and blast with cool air.

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Photo: © John Spellman / Retna Ltd

Nina Dobrev

Not only is a long, straight hairstyle like Nina's super chic, it's also easy to do. Just run a flatiron over heat-protected strands and comb your way to sexy nighttime hair like hers!

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Photo: © RD / Orchon / Retna Digital

Mena Suvari

Blunt bobs are a perfect match for stick straight strands. Emphasize your crisp bangs and sharp cut with simple hairstyling, just like Mena Suvari.

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Photo: © Byron Purvis / AdMedia / Retn

Kim Kardashian

When Kim Kardashian got her post-divorce revenge hair, she opted for eyebrow-grazing bangs and pin straight styling. The curvaceous reality star proves that simple can be very sexy.

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Dianna Agron

Straight hair doesn't have to be boring. Add a funky twist to half-up styles by playing with volume and proportion, like Dianna Agron. The Glee star adapted a faux-hawk to fit her red carpet needs with lifted roots and a behind-the-ear hair tuck.

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Sandra Bullock

Straight styles are perfect for showing off trendy ombre highlights. Sandra Bullock's fading color really popped when she rocked this sleek hairstyle at a movie premiere. Keep highlights brilliant with a color conditioning spray, like Matrix's Miracle Treat Lotion ($18.99)

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Michelle Williams

Gutsy gals who dare to wear pixie cuts know the power of a good flatiron. Crops like Michelle Williams' look super chic and incredibly stylish when worn straight and brushed forward. Try accessorizing your short hairdo with a jeweled headband like she did at the Golden Globes.

Try on Michelle William's hairstyles in the Makeover Studio!