It's safe to say, the most talked about red carpet ensemble at the 2013 Oscars was the Prada "apron" donned by Anne Hathaway.

The pink dress sparked controversy not just because it seemed to highlight the 'Les Miserables' star's nipples, but also because it became a trending topic on Twitter (via a #LesNipplerables hashtag and an @HathawayNipple account).

People all over the web pondered how the 30-year-old could have made such a huge fashion misstep on Hollywood's most important red carpet — and now we may have a reason.

According to Refinery29, Anne Hathaway was never supposed to wear Prada to the Oscars; she had apparently tapped Valentino to design her gown. She changed her mind three hours before the awards show was set to start, reports US Weekly.

Which begs the question: what on earth happened, and how did Anne make such a terrible last-minute mistake?

The rumour is Hathaway saw what Amanda Seyfried was going to wear — a lace Alexander McQueen dress — and felt it was too similar to the gown she was set to don. (Valentino's press folks issued a release before the Oscars describing Anne's frock as "a pink embroidered tulle illusion gown," which sounds similar to the ensemble Seyfried actually wore.) Fashionista.com is reporting Anne "freaked out," not wanting to look similar to someone on the red carpet, and asked stylist Rachel Zoe to find something new for her to wear.

While all of this could just be conjecture, it is possible things like this happen behind closed doors. Take a look at the gown Anne wore compared with Seyfried's dress and the Valentino gown Ms. Hathaway was supposedly set to wear.

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  • Jessica Chastain

    in an Armani Privé dress, Christian Louboutin shoes and Harry Winston jewelry.

  • Anne Hathaway

    in Prada.

  • Charlize Theron

    in a Christian Dior Couture dress and Harry Winston jewelry.

  • Naomi Watts

    in an Armani Privé dress, Jimmy Choo shoes, a Roger Vivier bag and Neil Lane jewelry.

  • Amanda Seyfried

    in an Alexander McQueen dress, Roger Vivier shoes and Lorraine Schwartz jewelry.

  • Halle Berry

    in Versace.

  • Kristen Stewart

    in a Naeem Khan dress, Jimmy Choo shoes and Fred Leighton jewelry.

  • Jennifer Garner and Ben Affleck

    Garner in a Gucci dress and Neil Lane jewelry; Affleck in Gucci.

  • Renee Zellweger

    in Carolina Herrera.

  • Sandra Bullock

    in an Elie Saab dress and Oroton clutch.

  • Nicole Kidman

    in a L'Wren Scott dress and Fred Leighton jewelry.

  • Kerry Washington

    in a Miu Miu dress, Christian Louboutin shoes, Prada clutch, Chopard earrings and Fred Leighton ring.

  • Salma Hayek

    in Alexander McQueen.

  • Jennifer Aniston

    in a Valentino dress, Salvatore Ferragamo clutch and Fred Leighton jewelry.

  • Adele

    in a Jenny Packham dress and Lorraine Schwartz jewelry.

  • Olivia Munn

    in Marchesa.

  • Jennifer Lawrence

    in a Christian Dior Couture dress, Brian Atwood shoes, Roger Vivier clutch and Chopard jewelry.

  • Reese Witherspoon

    in Louis Vuitton.

  • Amy Adams

    in an Oscar de la Renta dress and Moa jewelry.

  • Bradley Cooper and guest

  • Hugh Jackman

    in Tom Ford.

  • Julie Yaeger and Paul Rudd

    Rudd in Giorgio Armani.

  • George Clooney and Stacy Keibler

    Clooney in Giorgio Armani; Keibler in a Naeem Khan dress, Giuseppe Zanotti shoes and Lorraine Schwartz jewelry.

  • Emmanuelle Riva

    in Lanvin.

  • Naomie Harris

    in Vivienne Westwood.

  • Steven Spielberg and Kate Capshaw

  • Helen Hunt

    in H&M.

  • Christoph Waltz and Judith Holste

  • Melissa McCarthy

    in David Meister.

  • Helena Bonham Carter

    in Vivienne Westwood.

  • Sally Field

    in Valentino.

  • Zoe Saldana

    in an Alexis Mabille Couture dress, Roger Vivier shoes, Salvatore Ferragamo clutch and Neil Lane jewelry.

  • Octavia Spencer

    in a Tadashi Shoji dress, Prada shoes, Edie Parker clutch and Lorraine Schwartz jewelry.

  • Harvey Weinstein and Georgina Chapman

  • Richard Gere

  • Quentin Tarantino and Lianne Spiderbaby

  • Mark Ruffalo and Sunrise Coigney

  • Jamie Foxx and Corinne Bishop

    Foxx in Calvin Klein.

  • Jeremy Renner

    in Givenchy.

  • Justin Theroux

    in Salvatore Ferragamo.

  • Queen Latifah

    in Badgley Mischka.

  • Daniel Day-Lewis and Rebecca Miller

    in Domenico Vacca.

  • Dustin and Lisa Hoffman

    Dustin in Calvin Klein.

  • Tom Hooper

  • Jane Fonda

    in a Versace dress and Chopard jewelry.

  • Norah Jones

    in a Tadashi Shoji dress and Swarovski clutch.

  • Marcia Gay Harden

    in a David Meister dress, Swarovski clutch and John Hardy jewelry.

  • Catherine Zeta-Jones

    in a Zuhair Murad dress and Lorraine Schwartz jewelry.

  • Jennifer Hudson

    in a Roberto Cavalli dress, Giuseppe Zanotti shoes, Jimmy Choo clutch and Sutra jewelry.

  • Bryan Cranston and Robin Dearden

  • Gloria Reuben

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  • Anne Hathaway & Sarah Silverman

    Anne Hathaway carrying her Oscar for best supporting actress greets comedian Sarah Silverman as they arrive for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Fashion credit: Custom dress by Saint Laurent) (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Jennifer Lawrence

    Jennifer Lawrence carrying her Oscar for best actress arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Christoph Waltz

    Christoph Waltz poses with his Oscar for best supporting actor after arriving for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Daniel Day Lewis

    Daniel Day Lewis carrying his Oscar for best actor arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • John Travolta & Kelly Preston

    John Travolta and his wife Kelly Preston arrive for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Tommy Lee Jones & Jon Voight

    Tommy Lee Jones is greeted by Jon Voight as they arrive for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Jean Dujardin

    Jean Dujardin arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Patricia Clarkson

    Patricia Clarkson arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Miranda Kerr & Orlando Bloom

    Miranda Kerr and Orlando Bloom arrive for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Fashion credit: Bloom's tuxedo by Saint Laurent.) (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Jesse Tyler Ferguson

    Jesse Tyler Ferguson arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Reese Witherspoon

    Reese Witherspoon arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Bradley Cooper

    Bradley Cooper arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Jeremy Reiner & Olivia Munn

    Jeremy Reiner and Olivia Munn arrive for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Ben Affleck

    Director Ben Affleck arrives for the 2013 Vanity Fair Oscar Party hosted by Graydon Carter at Sunset Tower on February 24, 2013 in West Hollywood, California. (Photo by Larry Busacca/VF13/Getty Images for Vanity Fair)

  • John Travolta

    John Travolta attends the Oscars Governors Ball at Hollywood & Highland Center on February 24, 2013 in Hollywood, California. (Photo by Kevork Djansezian/Getty Images)

  • Amy Adams & Charlize Theron

    Amy Adams and Charlize Theron attend the Oscars Governors Ball at Hollywood & Highland Center on February 24, 2013 in Hollywood, California. (Photo by Kevork Djansezian/Getty Images)

  • Kelly Preston & John Travolta

    Kelly Preston and John Travolta attend the Oscars Governors Ball at Hollywood & Highland Center on February 24, 2013 in Hollywood, California. (Photo by Kevork Djansezian/Getty Images)

  • Amy Adams, Joseph Gordon-Levitt & Charlize Theron

    Actors Amy Adams, Joseph Gordon-Levitt, and Charlize Theron attend the Oscars Governors Ball at Hollywood & Highland Center on February 24, 2013 in Hollywood, California. (Photo by Kevork Djansezian/Getty Images)

  • Diane Kruger & Joshua Jackson

    Diane Kruger arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California following the 85th Academy Awards ceremony. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Richard Gere and Elizabeth Banks

    Richard Gere and Elizabeth Banks arrive for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California following the 85th Academy Awards ceremony. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Allison Williams

    Allison Williams arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California following the 85th Academy Awards ceremony. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Anne Hathaway

    Anne Hathaway carrying her Oscar for best supporting actress and her husband arrive for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Natalie Portman & Benjamin Millipied

    Natalie Portman and Benjamin Millipied arrive for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California following the 85th Academy Awards ceremony. (Fashion credit: Millipied's tuxedo by Saint Laurent) (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Amy Poehler

    Actress Amy Poehler arrives at the 2013 Vanity Fair Oscar Party hosted by Graydon Carter at Sunset Tower on February 24, 2013 in West Hollywood, California. (Photo by Pascal Le Segretain/Getty Images)

  • Jennifer Westfeldt

    Jennifer Westfeldt arrives at the 2013 Vanity Fair Oscar Party hosted by Graydon Carter at Sunset Tower on February 24, 2013 in West Hollywood, California. (Photo by Pascal Le Segretain/Getty Images)

  • Jon Hamm & Jennifer Westfeldt

    Jon Hamm and Jennifer Westfeldt arrive for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Zooey Deschanel

    Zooey Deschanel arrives for the 2013 Vanity Fair Oscar Party on February 24, 2013 in Hollywood, California. (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

  • Miley Cyrus & Kelly Osbourne

    Miley Cyrus and Kelly Osbourne attend Grey Goose at 21st Annual Elton John AIDS Foundation Academy Awards Viewing Party at Pacific Design Center on February 24, 2013 in West Hollywood, California. (Photo by Alexandra Wyman/Getty Images for Grey Goose Vodka)

  • Elton John & Chris Brown

    An alternate view of Sir Elton John and singer Chris Brown at the 21st Annual Elton John AIDS Foundation Academy Awards Viewing Party at Pacific Design Center on February 24, 2013 in West Hollywood, California. (Photo by Jamie McCarthy/Getty Images for EJAF)

  • Elton John & Heidi Klum

    An alternate view of Sir Elton John and model Heidi Klum at the 21st Annual Elton John AIDS Foundation Academy Awards Viewing Party at Pacific Design Center on February 24, 2013 in West Hollywood, California. (Photo by Dimitrios Kambouris/Getty Images for EJAF)

  • Gerard Butler

    Actor Gerard Butler arrives for the 2013 Vanity Fair Oscar Party hosted by Graydon Carter at Sunset Tower on February 24, 2013 in West Hollywood, California. (Photo by Larry Busacca/VF13/Getty Images for Vanity Fair)

  • Christoph Waltz & Jennifer Lawrence

    Actors Christoph Waltz and Jennifer Lawrence attend the Oscars Governors Ball at Hollywood & Highland Center on February 24, 2013 in Hollywood, California. (Photo by Kevork Djansezian/Getty Images)

  • Quvenzhane Wallis

    Actress Quvenzhane Wallis attends the Oscars Governors Ball at Hollywood & Highland Center on February 24, 2013 in Hollywood, California. (Photo by Kevork Djansezian/Getty Images)

  • Khloe Kardashian, Kim Kardashian & Heidi Klum

    TV Personalities Khloe and Kim Kardashian and model Heidi Klum attend the 21st Annual Elton John AIDS Foundation Academy Awards Viewing Party at Pacific Design Center on February 24, 2013 in West Hollywood, California. (Photo by Dimitrios Kambouris/Getty Images for EJAF)

  • Amanda Seyfried & Samantha Barks

    Amanda Seyfried and Samantha Barks arrive for the 2013 Vanity Fair Oscar Party hosted by Graydon Carter at Sunset Tower on February 24, 2013 in West Hollywood, California. (Photo by Larry Busacca/VF13/Getty Images for Vanity Fair)

  • Vanessa Hudgens & Selena Gomez

    Actors Vanessa Hudgens and Selena Gomez arrive for the 2013 Vanity Fair Oscar Party hosted by Graydon Carter at Sunset Tower on February 24, 2013 in West Hollywood, California. (Photo by Larry Busacca/VF13/Getty Images for Vanity Fair)