Red carpet rebels! The Met Ball's most outrageous looks

The annual Costume Institute Gala at the Metropolitan Museum of Art, otherwise known as the Met Ball, always offers a stunning parade of celebrity fashion. Stars and designers come together for a night dedicated to haute couture, inspired by a theme that changes year to year, and over-the-top looks often rule the night.

The dress code for this year's gala, held on Monday night, calls for attendees to wear "evening dress and decorations" for a very Downton Abbey-esque aesthetic. While we don't yet know who will emerge as the night's fashion winner, let's take a stroll down memory lane at the most memorable looks of Met Balls past.

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Allison Williams attends the Costume Institute Gala for the

That's not what Marnie would wear! "Girls" star Allison Williams went over to the dark side in a racy look for last year's punk-themed gala.

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Model Amber Valetta attends the

Amber Valetta channeled Marie Antoinette in this gown in 2004.

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Musician Madonna attends

Madonna, looking ageless as always, wore over-the-knee boots on the red carpet in 2009.

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Jennifer Lawrence and Sarah Jessica Parker attends the Costume Institute Benefit at The Metropolitan Museum of Art May 6, 2013, celebrating the opening of Punk: Chaos to Couture.

When stars collide! Sarah Jessica Parker and Jennifer Lawrence cozied up on the red carpet in 2013.

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Karolina Kurkova attends the MET Costume Institute Gala Celebrating Chanel at the Metropolitan Museum of Art May 2, 2005 In New York City.

Model Karolina Kurkova had a message for fellow partygoers in this bold graffiti gown in 2005.

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Kim Kardashian and Kanye West attend the Costume Institute Gala for the

A very pregnant Kim Kardashian got a lot of flak for this floral gown, which she wore to the event alongside then-boyfriend — and fashion lover — Kanye West.

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Actress Maggie Gyllenhaal arrives at the Metropolitan Museum of Art Costume Institute Gala, Superheroes: Fashion and Fantasy, held at the Metropolitan Museum of Art on May 5, 2008 in New York City.

Maggie Gyllenhaal went for a sweet and romantic look in 2008 for the "Fashion and Fantasy"-themed event.

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Designer Bob Mackie and Cher attend The Metropolitan Museum's Costume Institute Gala Exhibition of

Cher looked out of this world at the Met Ball in 1985, which she attended with fashion designer Bob Mackie.

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Beyonce attends the Costume Institute Benefit at The Metropolitan Museum of Art May 7, 2012, celebrating the opening of Schiaparelli and Prada: Impossible Conversations in New York.

Beyonce left little to the imagination in a dazzling — and very sheer — blue feathered gown at the event in 2012.

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Jessica Simpson attends the Metropolitan Museum of Art Costume Institute Benefit Gala

A brunette Jessica Simpson showed off plunging cleavage in this metallic halter gown in 2007.

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Actress Chloe Sevigny arrives for the Metropolitan Museum of Art's 2012 Costume Institute Gala benefit.

Chloe Sevigny's short 'do and cropped dress left her looking very mod.

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Nicole Richie at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of

Nicole Richie, looking otherwordly in a silver sheath with silvery hair, managed to look both spooky and serene.

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Actress Christina Ricci attends the

Christina Ricci showed off a cobwebbed look in this spidery gown in 2011.

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Ashley Olsen attends the Costume Institute Gala for the

Is that an Olsen twin under there? Ashley Olsen went for a loose look in a glittery muumuu-style mustard-colored sheath.

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Eva Mendes attends the Metropolitan Museum of Art Costume Institute Benefit Gala: Anglomania at the Metropolitan Museum of Art May 1, 2006 in New York City.

Eva Mendes went for va-va-voom glamour in this empire-waisted gown in 2006.

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    2013 Met Costume Gala

    A-listers mixed a punk edge into their usual red-carpet glamour for this year's annual Costume Institute Gala.

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    Anne Hathaway, Beyonce and Madonna were among the dozens of celebrities who attended the 2013 Costume Institute Gala at the Metropolitan Museum of Art on May 6 in New York City. Many took this year’s theme, "Punk: Chaos to Couture," to heart.

    Oscar winner Anne Hathaway dressed in Valentino and revealed a new platinum ’do.

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    Designer Nicole Richie wears custom Topshop and a bright white hairstyle.

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    "The Great Gatbsy" star Carey Mulligan goes for subtle and chic in a Balenciaga sheath dress.

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    Actress Sienna Miller paired a tough studded jacket with a white floor-length Burberry gown.

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    Gwyneth Paltrow -

    "Iron Man 3" star Gwyneth Paltrow looks pretty in hot pink Valentino.

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    Actress and activist Jessica Alba accentuates her assets in Tory Burch.

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    Kanye West, Kim Kardashian -

    It’s all roses from here until the pregnant reality star, in Riccardo Tisci, delivers her first child.

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    Kate Beckinsale. -

    The actress gets sassy in an asymmetrical Alberta Ferretti.

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    Jason Sudeikis, Olivia Wilde -

    The SNL star escorts his fiancé.

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    January Jones -

    The "Mad Man" actress channels the punk swan look.

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    Punk means spiky hair and a full-length fishnet gown by Marc Jacobs.

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    Football player Tom Brady and model Gisele Bundchen.

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    The former ‘Sex and the City’ star gets fierce with her mohawk headpiece by Philip Treacy.

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    Madonna -

    The Material Momma rocks a jacket over thigh high fishnets and hot pink spikes.

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    Emma Watson -

    Hermione definitely has grown up, as proof by her glamorous hand-draped Prabal Gurung gown.

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    Blake Lively -

    The actress wears Gucci -- and lots of feathers.

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    Nicki Minaj -

    Punk apparently means looking conventional in a royal blue Tommy Hilfiger gown.

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    Jennifer Lopez, Michael Kors -

    The singer had fashionistas seeing spots as she sports a form-hugging gown designed by her escort, Michael Kors.

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    Katy Perry -

    The crooner crowns herself Dolce & Gabbana queen.

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    The actress rocks the pantsuit from Stella McCartney.

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    Tiger Woods, Lindsay Vonn -

    The Olympic skier and golfing great get excited over the chance to get out gym clothes.

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    The “Hunger Games’ actress dons a gold beaded Versace jacket – and not much else.

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    The “New Girl” star, in a one-shouldered Tommy Hilfiger gown, is nearly unrecognizable without her trademark bangs.

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    The Sports Illustrated swimsuit model covers up with a Diane Von Furstenberg gown.

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    Gavin Rossdale, Gwen Stefani -

    The rock singers get some couple time on the red carpet.

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    The actress strikes a pose in Calvin Klein.

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    The Oscar winner and “Hunger Games” star shuns punk to stun in Dior.

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    Jessica Pare -

    The “Mad Men” star wears Jason Wu.

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    Giuliana Rancic -

    The E! host goes metallic.

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    Ginnifer Goodwin -

    The “Once Upon a Time” star laid it on thick – the eye brows and eyelids, that is. The black trim theme carries through in her gold Tory Burch gown.

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    The actress sparkles in Carolina Herrera.

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    Michelle Williams -

    The actress wears a Saint Laurent gown that cuts away above her knees to show off her matching t-strap heels.

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    Cameron Diaz -

    The actress is under wraps with her cobalt Stella McCartney gown and her belt of spikes.

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    The actress contrasts the red carpet with her green Zac Posen gown.

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    The actress is anything but punk in her billowing white Calvin Klein gown.

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    Ashley Olsen -

    Orange you glad you’re here, Ashley?

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    Taylor Swift -

    The singer looks fierce in her studded J. Mendel gown.

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    Kerry Washington -

    The “Scandal” star spots black and blue Vera Wang and full-length leather gloves.

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    Emilia Clarke -

    The “Game of Thrones” actress is the lady in Ralph Lauren red – and the oversized cross earring.

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    Rooney Mara -

    The actress wears a white zippered Givenchy gown and punks up the look with dark, vampish lipstick.

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    Beyonce Knowles -

    The gala’s honorary chair makes a grand entrance in Givenchy.

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