Best and Worst Hairstyles of 2013 (PHOTOS)

Adele's red carpet rule #1: Nothing less than perfect will do.

She said it took her three months to get it to the perfect pixie length, after shaving off all her hair for her role in the upcoming Mad Max: Fury Road. At the Academy Awards, she proved that good things do indeed come to those who wait.

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This look may have been short in length, but it was not short on controversy. When Kloss arrived to model in last fall's Victoria's Secret show with the new chin-skimming cut, the brand promptly added back on the length with extensions and caused an uproar. But Kloss stuck with her bob and proved just how sexy it can be, especially at the Cannes Film Festival. In fact, these days "The Karlie" is in the running for becoming almost as legendary as "The Rachel."

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Now you see it, now you don't. The actress adopted the bob this summer, and it looked every bit the picture of perfection. What we continue to be mystified about, however, is the addition of bangs at some events and the return of her sideswept lengths at others. Is she playing with clip-ins? If so, we give her credit for the experimentation but not so much for the results.

The president himself joked that they were the most significant event of his inaugural weekend, and it’s no wonder why. They were the bangs seen around the world, sparking debate from millions for or against the blunt fringe FLOTUS unveiled in January. She would later go on to grow them out, but that doesn’t mean they won’t go down in history as one of the White House’s most fashionable moments.

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We know Britney still has some major moves, which is why we never understood the stiff, stick-straight bangs she wore on "The X Factor."

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Every once in a while, a celebrity steps out on the red carpet and makes every other look around her seem, well, a little too fussy. That celebrity this year was Cotillard, who appeared at the SAGs in a side-parted lob that looked effortless, modern, and très, très chic.

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We are huge fans of K.Stew's red carpet style—no question. However this particular side part just doesn't do it for us.

We love Miley’s short 'do. We just think it works better sans spikes.

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Her gown received mixed reviews, but her fishtail braid that started high upon her forehead and cascaded down her bare shoulder gets our nomination for the prettiest look at the Golden Globes.

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She’s envied for always pulling off that just rolled-out-of bed look. But at the MTV Awards, the supermodel literally looked like she just rolled out of bed.

It was the year of Beyoncé. But she wasn’t the only Knowles that everyone had their eye on. Her little sister’s every move was also closely followed, especially when it came to her larger-than-life natural curls.

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The petite 5'2" rapper has always made a big statement with her hair. This curls-to-there statement was perhaps her biggest yet.

The girl with the raven hair continued her red carpet beauty streak in 2013. Gone may have been the black hue that made one of the boldest statements at the Oscars the year before, but still in play were the contrast of her dark locks against her alabaster skin and a lack of fear in going for the severe. At the Side Effects premiere, she tautly pulled her hair into a sculptural bun, creating a beautiful line that swept up from her chin all the way to her crown.

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From the side, Paquin's updo was an elegant arrangement of twists and coils. From the front, it was a different story entirely.

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Zoe Saldana wore them. So did Emmy Rossum, Freida Pinto, and Sienna Miller. They were jeweled hair accessories and they delivered an extra dimension to hairstyles this year. One of our favorite looks was this Fred Leighton diamond-encrusted headband on Michelle Williams at the Met Gala. Talk about a million-dollar baby!

We're trying to embrace this trend while we can. After all, it's great to be playful with your hair. But with just about every pop star streaking their strands in pink, purple, blue, and red hues—and all at once—what's often referred to as My Little Pony hair is now a fad that we might remember with a tinge of regret.

The low ponytail reached new heights this year. One of the best interpretations of the trend? Kidman’s slick-and-poufed combo at Cannes. C'est magnifique!

On the runways, the wet look always seems like a good idea. In real life, gelled strands never quite seem to work. Kardashian pulled off the dual-textured style better than others, but we can only imagine how striking she would have been here with a little less product and a little more structure.