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The MTV Movie Awards' Best and Worst-Tressed

WORST: Brooklyn Decker

We get it—you're pretty. And we gave you a pass at the Met Ball when you tweeted that you didn't feel it was appropriate to care about doing your hair when so much was going on in the world. What was your excuse last night? Pretty girls still need to get all dolled up for the red carpet, sweetie. That's what we, the GP, are paying for.

BEST: Cameron Diaz

These are beachy waves done right. And notice how she's not a box-dyed blonde anymore? She's going a bit more natural (big summer trend). Darker blonde roots, lighter blonde tips. Loving the pink lips (another big trend). Nobody does California summer quite like Cam, and she's on her A-game here (even without A-Rod).

WORST: Kristen Stewart

Love the smile (she has teeth, not fangs—who knew?), loathe the hair. It looks like she hasn't brushed it in days. It's disheveled, dry, and the color washes out her skin tone. Or maybe she's just very, very pale—aftermath from all of the Twilight films.

BEST: Blake Lively

Leo does a lady good! Blake looks fabulous. From the ponytail, girly yet sophisticated, to the flirty eyes (lots of lashes!), to the neutral lips and rose-hued sweep of powder on the cheeks, she's fresh and age-appropriate.

WORST: Chelsea Handler

She's trying to do beachy waves, but they're not working. Instead, she's got a case of frizzies. She needs some hair oil, stat. And those roots—not cute. There's also something amiss with the makeup. It's as though her forehead is super Botoxed (and shiny), yet her eyes show her true age? We can't quite put my finger on the problem—we just know it's not working.

WORST: Nicki Minaj

We know you like your pink lips, Nicki, but pale, bubblegum pink (with liner? This is not the '90s!), just isn't working. And those fake lashes remind us of Chia Pets: if you water them, they will grow. Trend overload!

BEST: Leighton Meester

Looking fab, like a beautiful sun-kissed, beach-bronzed goddess—and just in time for summer. The ombre hair (dark roots, light tips) is perfect; the glowing, tanned skin is enviable; and the dark-lined eye is equal parts sexy and fun. Great, effortless choice for MTV.