01/19/2014 10:09 am ET Updated Dec 06, 2017

Think You Can't Go Blonde? Stars On This Week's Best & Worst Beauty List Make It Look Easy

There wasn't a red carpet or panel this week that celebrity blondes didn't dominate.

Brooklyn Decker sported some seriously stunning waves while promoting the new CBS television series "Friends With Better Lives." Meanwhile, Molly Sims looked like a '60s sex kitten with her tousled waves at a star-studded party for designer Diane von Furstenberg. And Heidi Klum wore a bangin' hairdo to host the 50th anniversary celebration of the Sports Illustrated Swimsuit Issue.

Scroll down to see how the hottest blondes in Hollywood do it (plus more noteworthy hair and makeup looks).

BEST: Brooklyn Decker

brooklyn decker

THIS is the kind of hair we're trying to achieve when we use a clipless curling iron. Decker's thick, lush waves cascade down her shoulders and work well with simple eyeliner and berry pink lipstick.

BEST: Molly Sims

molly sims

Full eyelashes are hard to pull off on the red carpet (much less in "real life"), but Sims succeeds by keeping the rest of her makeup minimal and pairing her '60s-inspired eye makeup with loose, tousled curls.

BEST: Heidi Klum

heidi klum

Heidi is giving us supermodel hair with her lash-grazing bangs and sleek hair. We also love how she used the classic white eyeliner trick to brighten up her eyes.

BEST: Lupita Nyong'o

lupita nyongo

What else can we say about the "12 Years A Slave" star's hair and makeup that hasn't been said? So we'll just keep gushing about her glowy complexion.

BEST: Camilla Belle

camilla belle

We are beyond elated to see Belle finally growing into this bob haircut -- the flirty flip frames her face beautifully. And her bold brows, curvy winged-out liner and pink lips would make for great night-out makeup.

WORST: Kaley Cuoco

kaley cuoco

If we could only convince this "Big Bang Theory" actress to ditch the awkward eyeshadow she's known for during awards show season. Cuoco ends up looking extremely tired or hungover.

WORST: Zosia Mamet

zosia mamet

Just as we were really starting to like Mamet's choppy bob haircut, she goes and ruins it with harsh brown eye makeup and unkempt brows.

WORST: Tyra Banks

tyra banks

If Tyra Banks were at an Amy Winehouse-themed costume party, this hair and makeup would be okay. But she's not, and this simply does nothing for her naturally stunning looks.

WORST: Kate Mara

kate mara

Whoever told Kate Mara it was a good idea to weigh down her scalp with all that gel is not a good friend. The sloppy 'do draws attention to her dry and parched blonde ends.

WORST: Aneesa Ferreira

anessa ferreira

Let this be a lesson on how NOT to apply bronzer. The "Real World" alum's skin tone looks super orange because she's wearing faux glow like blush. But we love the dark lipstick!

More celebrity best and worst beauty looks:

Best & Worst Beauty Looks

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