The best & worst hollywood beauty of 2012

Perhaps the most memorable beauty moment of 2012 belongs to actress Rooney Mara. She cut bold, blunt bangs for her role in The Girl With the Dragon Tattoo and, after growing them out a bit, made the look her signature.

Jessica Biel's bangs were at the opposite end of the spectrum, with fringe so long it hid her eyes, and a rounded shape that failed to flatter. However, slightly shorter and swept to the side, these bangs later became a hit.

This year, the bun graduated from a bad-hair-day solution to red carpet regular. Olivia Wilde was one of the first to modernize the style at the Vanity Fair Oscar Party, where she wore her big, gutsy bun high on the crown of her head.

From gray hair to fuchsia lips, this year Kelly Osborne has made a lot of bold statements that work for her. But this towering topknot she wore to spring 2013 Fashion Week in New York City? She clearly took this trend too far—and too high.

Drew Barrymore was one of the first celebs to debut the ombre hair-color trend in 2010, and since then has been the poster girl for this beachy, boho color that starts with dark roots and gradually fades to lighter ends. In February, she showed off a more high-contrast effect that inspired a lot of gals to run to their colorist.

Alas, what goes up must come down. Just a few days after showing off enviably long ombre locks on the Tonight Show With Jay Leno, Drew Barrymore lopped off much of her length and went for a darker base color with brassy ends. Without those bright strands around her face, the look is too dark and unnatural.

It's hard to imagine Taylor Swift without her signature red lip, which contrasts so beautifully with her alabaster complexion. Over the past year, the star has inspired plenty of women to put down the gloss and pick up a more grown-up, old-Hollywood lipstick.

Dramatic lips were all over the red carpet this year, but Emma Stone missed the mark with this gothic pout. The high-gloss berry color is too severe for her fair skin.

In addition to all of her other enviable curves, Kim Kardashian’s long, feathery lashes have become part of her signature style. They also help draw the eye above her shoulders.

We're a big fan of Ginnifer Goodwin's iconic pixie haircut and mod makeup, but the spiky lashes she wore to the American Music Awards looked more clownish than glamorous.

When adorably awkward Zooey Deschanel sported this black-and-white tuxedo-themed mani at the Golden Globes, she brought the niche nail-art trend into the public eye.

Everyone wants to have a unique mani that makes a statement, but Cheetah Girls singer Adrienne Bailon's tips are so decked out, we'd be scared to shake her hand for fear of a laceration.

2012 was the year of the braid, the fishtail being one of the most popular styles. Blake Lively wove the perfect mix of slightly messy and totally glamorous with her long blond locks.

Old Hollywood made a big comeback this year, and it started with Charlize Theron on the Golden Globes red carpet. Her sparkly vintage headband, deep side part with subtle finger waves and sparkling pink makeup came together to create an alluring art deco appeal.

We love Nicole Richie's signature boho style. Unfortunately, her messy-on-purpose vibe didn't translate well when she tried this retro-glam look. Her finger waves and smoky eyes were too undone, and her colorless lips make her look washed-out.

Rose Byrne turned heads at the SAG Awards when she debuted her new chin-length bob, cut to perfection with bold bangs, blunt ends and major shine. The look made a strong case for a more polished look after so many years of bedhead celeb hairstyles.

We can see why Cameron Diaz would want to hop on the bob bandwagon—it can be an easy, sporty hairstyle that would fit perfectly with her active life and chic, laidback style. But her tousled waves are too stiff and dry to look carefree.

Pink, purple, blue—you name the wacky hair hue, and Katy Perry has pulled it off as only a true pop princess can. Her best non-natural hair color of the year? The sleek blue bob that she wore when he made her first red carpet appearance after breaking up with Russell Brand.

We get it—funky hair colors are fun. It's actually amazing how many non-rock-star celebrities sported rainbow hair colors this year, some quite impressively. Unfortunately we can't say that for Jaime King. Not only does this attempt at an ombre blue hue wash out her face, it just looks like she's trying too hard to be cool.