Top 10 Straight Hairstyles

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.

Heidi Klum

See 10 Products To Try In 2012!

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.

Rachel Bilson

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?

Viola Davis

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.

Elizabeth Olsen

Click here to see five more sleek and straight celeb hairstyles!