By Wonderwall.com Editors
6:21am PDT, Jul 7, 2009
It's time once again for Wonderwall's examination of celebrity hair: where it can go right and where it can go terribly, horribly wrong.
We admit it, Taylor Momsen's hair looks pretty hip. Still, Taylor, you're only 15 years old. DON'T veer into overprocessed Courtney Love territory just yet.
We're feeling Stephanie Pratt's natural-looking, face-framing DO. Might she inspire sister-in-law Heidi Montag to part ways with those porny-looking hair extensions? Don't hold your breath.
When rocking a hair shade not found in nature, DON'T wear matching lipstick. Eva Green learned this lesson the hard way.
In the summer, DO considering shaving one side of your head to promote proper ventilation, a la Cassie at P. Diddy's White Party.
Denise Richards' life is complicated, just like her braids — which are threatening to unravel on her way back from a workout. DON'T let this happen to you, gym bunnies.
Okay, Hayden Panettiere's blowout makes her look a little bit like "Rising Starlet Barbie." Still, we think her sleek, simple style is a DO.
Dear Mischa Barton, your dirty hipster schtick was fun for a while, but now we're getting seriously worried about your personal grooming habits. DON'T give up on shampoo entirely, and we won't give up on you.
Here, Selma Blair fails victim to a common hair DON'T: If you must keep your hair in a stern, schoolmarm bob, at least keep an inviting smile on your face.
Can anyone pinpoint the exact moment when Ashlee Simpson became the more palatable Simpson sister? In any case, her hippie-dippie flaming-red hairstyle is a DO.
