By Brian Truitt, USA TODAY
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Blanca Blanco bared a bit too much in this garish red and white gown in 2018.
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There are so many things wrong with this dress on Dakota Johnson in 2017. It's a lot of fabric, poorly cut, in a color that doesn't necessarily flatter her fair complexion.
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The "South Park" crew (Trey Parker, left, Matt Stone and Marc Shaiman) questionably took notes from famous dresses worn by J. Lo and Gwyneth Paltrow in 2000.
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Speaking of too sheer, Hilary Swank showed off a rare misstep with this pink gown with a see-through skirt in 2003.
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In 1999, Celine Dion arrived in a questionable white backless suit.
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Shiny, purple and waaay too much tulle. Tyra Banks called on the wrong designer friend to dress her in 2000.
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Fringe and old-lady hair. What was Kate Hudson thinking in 2001?
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No list would be complete without Cher's shockingly (at the time) nude getup from designer Bob Mackie in 1988.
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Speaking of Gothic design disasters, this Elvira look did nothing for the gorgeous Angelina Jolie, who was still solidly in her punk phase in 2000.
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It's the swan dress that launched a thousand memes! Bjork hit just about every worst-dressed list in 2001, when she showed up at the Oscars in the bird dress. Who else ended up in our "worst" hall of fame?
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Gwyneth Paltrow has become a fashion staple at the Oscars, but 2002 was a rare Gothic misfire.
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In 1997, Juliette Binoche won best supporting actress for "The English Patient." She deserved better than this merlot-hued, high-collared crushed velvet gown.
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Heather Mills, then engaged to Paul McCartney, took the wrong approach in this two-piece lace gown in 2002.
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Sophia Loren may be a legend, but her 2009 yellow dress was a fashion miss.
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Rachel Griffiths thought a camera purse would distract us from this shiny bridesmaid's gown in 1999.
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The look was so memorable that Ellen DeGeneres wore it as a gag while hosting the Emmy Awards later in the year.
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Kim Basinger tried an avant garde look in 1990. It fell flat.
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In 1992, Geena Davis took the princess look a bit too far.
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Demi Moore in 1989: Yes, that's bike shorts, a bustle and a corset that you're seeing.
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We could never figure out what the deal was with costume designer Lizzy Gardiner's 1995 Amex dress, made of gold cards. Maybe she needed the points?
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In 2004, Uma Thurman rocked so. Much. Material.
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2013: Um, this is the Oscars, aka the wrong event to put that much cleavage on display. Save it for Bravo, Brandi Glanville!