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The fresh-faced 20-year-old showed off her penchant for satiny separates — is it just me or do her pants match the tablecloth? — and pointy-toed stilettos when she stopped by Jimmy Choo's Oscar Collection preview in 2004.
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After Blender declared her to be "The Next Big Thing" in October 2004, invites to Hollywood parties started to trickle in. At an Oscar viewing event in 2005, Perry showed she still had lots to learn when it came to posing on (and accessorizing for) the red carpet.
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During her first trip to New York Fashion Week in 2007, Perry hit the Rock & Republic Fashion Rocks pre-party wearing a strapless pink cocktail dress and matching fascinator.
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Dressed in a fruit-print frock and combat boots, Perry was out to drum up buzz about the soon-to-be-released album One of the Boys during Betsey Johnson's show at New York Fashion Week in February 2008. "My [EP] is in the little gift bags," the singer told one reporter. "I'm whoring myself out."
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''Katy didn't care so much about designers in the beginning,'' Perry's longtime stylist, Johnny Wujek, told T Magazine; see outfits like this hot pink embroidered jacket and emerald mermaid skirt, which the singer wore to her 2008 album release party.
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Perry rocked a vintage-inspired romper during a visit to MTV's Total Request Live in 2008.
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Take that, Carmen Miranda! To perform the hit single "I Kissed a Girl" at the 2009 Grammy Awards, Perry descended from the rafters wearing a glittering minidress embellished with a variety of sequined fruits.
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For her first trip to the Grammy Awards in 2009, Perry chose a demure (for her) pink gown by Lebanese designer Basil Soda.
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At the 2010 MTV Movie Awards, Perry topped off her cleavage-enhancing Herve Leger dress with an electric blue wig.
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Though she wouldn't officially introduce the world to alter ego Kathy Beth Terry until the following year, Perry got the chance to channel her inner nerd when she hosted the 2010 Teen Choice Awards.
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At the 2010 MTV Video Music Awards, Perry accessorized her Marchesa frock with Jimmy Choo sandals, an M.C.L. by Matthew Campbell Laurenza ring, and custom nail decals featuring images of then-fiancé Russell Brand.
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Swarovski crystals, layers of iridescent silk organza and a pair of angel wings were the basic elements of Perry's custom-made 2011 Grammy Awards dress, created by designer Giorgio Armani.
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At the New York City premiere of The Smurfs in 2011, a fair-haired Perry paid homage to Smurfette in a bedazzled mini by designing duo The Blonds and blue heels from Christian Louboutin.
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Pink hair, pink Jimmy Choos and a silk parasol took Perry's sequined Atelier Versace dress over the top at the 2011 MTV Video Music Awards.
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Her asymmetrical blue bob gave an avant-garde edge to the Blumarine gown Perry wore to the 2012 Elton John AIDS Foundation Oscars viewing party.
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While Perry got into spirit of the 2012 Kids' Choice Awards in a slime-covered crop top, a slime-print Gerlan Jeans skirt, and neon green Prada peep toes, she decided against a dyed-to-match hair color.
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At the Hollywood premiere of Katy Perry: Part of Me, Perry added her personal touches like a Judith Leiber Cake Slice crystal minaudière and a deep purple hair color to her chic Dolce & Gabbana velvet dress.