As we continue our countdown to 2013, we’re taking a look back at the best and biggest fashion moments of 2012. And to kick off our fashion flashback, we rounded up the best-dressed stars of 2012.

It was a stylish year for Hollywood. Not only did a whole new generation of style setters come into their own, but we saw some of our favorite stars really step up their style on their way to achieving icon status.

The competition for Hollywood’s best-dressed star really heated up in 2012, as we were treated to red carpet eye candy galore.

So who made this year’s best and worst dressed stars of the year?

Launch the gallery to check out the best and worst dressed stars of 2012.

Do you agree with our picks? Who do you think were the year’s best and worst dressed stars? Share your picks below.

Find out which star made the best and worst dressed list this year in the video below.

The stars didn’t let Thanksgiving preparations stand in the way of their style.

From the glamorous premieres of Hitchcock and The Silver Lining Playbook to the fashionable feasts themselves, this week was full of chic holiday style.

Who were the week’s big fashion winners?

Hitchcock stars Jessica Biel and Scarlett Johansson made the rounds in style while promoting their new film.

Meanwhile Jennifer Lawrence proved she’s more stylish than she lets on, as she looked sleek and sophisticated at the premiere of her new film.

Miranda Kerr won the award for the most glamorous celebrity mommy this week, as she attended events and business meetings in New York City this week in one great outfit after another. Which was our favorite?

You’ll have to check out our gallery to find out — plus, see all the week’s other wardrobe winners — and, of course, the style sinners. 

Do you agree with our picks? Share your favorite — then and least favorite — then looks of the week in the comments below.

One of music’s biggest nights, the American Music Awards always offers some of the most creative and eclectic fashion the red carpet has to offer.

Over the past 40 years, the AMAs have seen their fair share of fashion statements — the good, the bad, and the plain old wacky — and this year was no different.

At this year’s AMAs, the fashion was just as hot as the lineup of musical performances hitting the stage, with an endless array of fashion hits walking the red carpet. From sparkly dresses to glam gowns and flirty frocks, we’ve rounded up all the night’s most noteworthy looks.

The stars really sparkled, with shimmery dresses dominating the red carpet, from Taylor Swift’s glam gold-speckled frock and Hayden Panettiere’s shimmery silver dress to Carly Rae Jepsen’s confetti-like halter confection and Ginnifer Goodwin’s pink sparkly mock-neck mini dress.

Sexy styles abounded too, with Heidi Klum and Once Upon a Time‘s Jennifer Morrison rocking daring side slits, and of course, there were some more outrageous fashion moments, including Jordin Sparks‘ busy psychedelic printed gown.

And the red carpet had its share of style surprises too, from Pink and  Nikki Minaj’s surprisingly subdued gowns to Swift’s stem-revealing shorter hemline.

Check out all the best and worst fashion at the 2012 American Music Awards in our AMA red carpet fashion gallery.

Do you agree with our picks? Tell us who you think should have been on our best and worst dressed list.

Christmas came early on the red carpet this week, with almost too many buzz-worthy fashion moments to count.

From the star-studded premieres of some of the biggest holiday blockbusters to fetes honoring Glamour and GQ‘s women and men of the year, respectively, and fashion’s up-and-coming designers, there were plenty of red carpet events for showcasing the latest trends.

Twilight stars Kristen Stewart and Ashley Greene kicked off the week in style at the much-anticipated world premiere of The Twilight Saga: Breaking Dawn 2 in L.A. on Monday. And the cast kept the fantastic fashion coming as they split up to promote the film in New York and Spain.

Meanwhile Keira Knightley‘s wardrobe for her U.S. Anna Karenina promotional tour this week — including the custom Erdem  green gown she wore to the film’s L.A. premiere –  gave us just as much to talk about as her on-screen costumes.

At the Vogue/CFDA fashion awards, the fashion crowd, including Emma Stone and Christina Ricci, showed us how to work all the hottest holiday styles.

And across the pond, Kate Moss celebrated the launch of her new book by showing us why she’s a style icon in glamorous gold and leopard looks.

While there were plenty of style stars who showed us how to get it right this week, there were those that offered a lesson in what not to do.

From the week’s hits to the misses, we’ve rounded up all the week’s most notable fashion.

Click through the chic styles that caught our eye this week — then check out the ones that caught our attention for all the wrong reasons — then in our round-up of the week’s top style moments.

Do you agree with our picks? Share your favorite — then and least favorite — then looks of the week in the comments below.

Check out the latest red carpet trends in the video below.