Have you ever seen a celebrity wearing an outfit or dress so fabulous, so ingeniously put-together, that you can't get it out of your mind?

It happens to us every so often -- Michelle Williams at the 2006 Oscars, Ashley Olsen at the 2009 Met Gala and Jacqueline Kennedy, like, every single day come to mind. When the most flattering color meets the ideal cut, when gorgeous pieces are assembled in the cleverest of ways, when confident women take smart fashion risks, that's when moments of sartorial perfection happen. And when they do, we never forget it.

So we charged our staff with a nearly impossible task: name the Greatest Outfits Ever. Needless to say, almost no one could limit themselves to one pick. So we hereby present our incomplete, unscientific round-up of the greatest outfits of all time, in no particular order.

Agree? Disagree? Think we've overlooked something fabulous? Add your favorites in the comments!

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  • Gwyneth Paltrow in Tom Ford, 2012 Oscars

    Anya, HuffPost Style/Stylelist/Stylelist Home Editor-In-Chief: "This look is befitting not only of a movie star, but of a queen. Gwyneth did several completely original things, rarely seen on the Oscars red carpet, here: 1. Covered her arms. 2. With a cape! 3. No earrings OR necklace. 4. A hairdo that didn't look shellacked." (Getty photo)

  • Chloe Sevigny, June 2007

    Sarah, Stylelist News Editor: "Chloe Sevigny mixed orange, pink and nude without clashing. I think of this outfit whenever I wear a daytime dress for evening!" (Getty photo)

  • Kate Moss, 2005 Glastonbury Music Festival

    Christina, Stylelist Fashion Editor: "GAMECHANGER." (Getty photo)

  • Anne Bancroft in "The Graduate," 1967

    Brie, Stylelist/Stylelist Home Editor: "Anything Anne Bancroft wore in The Graduate (that leopard coat!)" (Getty photo)

  • Ashley Olsen, December 2005

    Michelle, Stylelist Home Associate Editor: "I love everything Ashley Olsen wears." (PMc photo)

  • Carey Mulligan in Prada, 2012 Met Gala

    Sarah, Stylelist News Editor: "I LOVE IT. She should have been the only one on the Best Dressed lists." (Getty photo)

  • Julianne Moore in Lanvin, Golden Globes 2011

    Rebecca, HuffPost Style Associate Editor: "I know it was a totally polarizing look, but I really loved Julianne Moore's dress to last year's Golden Globes. Such a great color..." (Getty photo)

  • Diane Keaton in "Annie Hall," 1977

    Nicole, Stylelist Home Intern: "LOVE Diane Keaton's get-ups in Annie Hall. They are timeless (and so is she)!" (Getty photo)

  • Uma Thurman in "Pulp Fiction," 1994

    Brie, Stylelist/Stylelist Home Editor: "Makes a white button down and black capris a must." (Courtesy photo)

  • Coco Rocha in vintage Givenchy, 2012 Met Gala

    Erica, HuffPost Style Intern: "I think it's fantastic (+her hair)!" (Getty photo)

  • Jacqueline Kennedy, March 1961

    Brie, Stylelist/Stylelist Home Editor: "Jackie Kennedy's many fabulous shift dresses freed everyone from the tyranny of the shirtwaist dress with voluminous skirt." (Getty photo)

  • Kirsten Dunst in Rodarte, 2009 CFDA Awards

    Rebecca, HuffPost Style Associate Editor: "Kirsten Dunst in Rodarte! (And all of the celebs who wore variations on that dress... besides Reese Witherspoon)." (Getty photo)

  • Jennifer Lopez in Zuhair Murad, 2012 Vanity Fair Post-Oscars Party

    Shana, Stylelist Intern: "I love really any jazzy outfit from J.Lo, especially her deep red sequined gown at the Vanity Fair Oscar party this year." (Getty photo)

  • Catherine Deneuve in "The Umbrellas of Cherbourg," 1964

    Brie, Stylelist/Stylelist Home Editor: "Girly without overkill." (Getty photo)

  • Michelle Williams in Vera Wang, 2006 Oscars

    Jessica, HuffPost Style Editor: "BOOM." (WireImage photo)

  • Ashley Olsen in The Row, 2009 Met Gala

    Michelle, Stylelist Home Associate Editor: "I love this look because it's dramatic and elegant. Plus it's sexy but in a subtle way." (Getty photo)

  • Audrey Hepburn in "Breakfast at Tiffany's," 1961

    Ellie, HuffPost Style Associate Editor: "Before Holly Golightly, how could we have known how cool plastic Ray-Ban shades looked with Givenchy Couture? Between the accessories, the fit and the hair, this look is simply one of the best ever." (Getty photo)

  • Jennifer Lopez in Versace, 2000 Grammys

    Christina, Stylelist Fashion Editor: "I'm gonna do it. I loved this." (Getty photo)

  • Rihanna in Gareth Pugh, June 2009

    Dana, Stylelist Beauty Editor: "Only RiRi can make 'Star Wars' style sidewalk-chic." (WireImage photo)

  • Penelope Cruz in Bottega Veneta, July 2009

    Sarah, Stylelist News Editor: "FLAWLESS." (Getty photo)

  • Jacqueline Kennedy, September 1970

    Brie, Stylelist/Stylelist Home Editor: "So Jackie. O." (Getty photo)

  • Karlie Kloss in Anthony Vacarello, October 2011

    Sarah, Stylelist News Editor: "THAT DRESS." (Getty photo)

  • Ashley Olsen in vintage Dior Couture, 2006 Met Gala

    Michelle, Stylelist Home Associate Editor: "I love everything Ashley Olsen wears." (Getty photo)

  • Jean Harlow in "Dinner at Eight," 1933

    Brie, Stylelist/Stylelist Home: "The languid 30s slipdress that she had to be sewn (!!) into." (Getty photo)

  • Solange Knowles in Acne, September 2011

    Dana, Stylelist Beauty Editor: "Solange as Diana Ross." (Getty photo)

  • Cate Blanchett in Givenchy, 2011 Oscars

    Christina, Stylelist Fashion Editor: "Hard to choose just one, but this one is up there." (Getty photo)

  • Natalia Vodianova in Vogue, July 2007

    Sarah, Stylelist News Editor: "I spent a whole summer wearing dark lipstick and white dresses. Yeah." (Courtesy photo)

  • Best Dressed Celebrities

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