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1 Naturally Curly Back in 2002, Hermione Granger and Watson shared the same hairstyle—wispy bangs and natural curls.
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2 Flower Power A flower pin to match her dress in 2004.
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3 Retro Pony Watson gave a nod to the '80s with her whole beauty look in 2004.
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4 Hidden Headband Watson has always had a love for headbands. Here, she wears an ivory one across her forehead.
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5 Messy Waves Going a little blonder calls for some messy waves.
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6 Beachy Blonde Watson is seen here even blonder (and a little tanner) back in 2007.
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7 Retro Flips These are the kind of bouncy flips you can only get with a round brush or hot rollers.
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8 Long Layers Watson's hair never stays long for very, well, long. Here she is with well defined layers.
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9 Double Headband This two-piece headband matched the delicate red details in her dress.
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10 Back To Curls Natural, undone curls at the 2010 Met Gala.
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11 Boho Braid Watson fastened her hair into a side braid for a trip to a music festival in 2010.
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12 The Pixie Debut It was the pixie seen 'round the world. Watson debuted the drastic change at a Warner Brothers Studio reception in November 2010.
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13 Slick Part Most fans see the cut for the first time, styled shiny and sleek, at the premiere of Harry Potter And The Deathly Hallows: Part 1 .
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14 Pin It Watson proves that even the shortest haircuts can still be accessorized.
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15 Jeweled Headband Watson never goes through an awkward pixie growth stage, opting instead to camouflage all the different layers with a sparkly headband.
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16 Slicked Back Watson proves just how versatile short hair can be with this slicked-back and shiny style.
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17 Wet Look When your hair can only be as dramatic as a deep side-part with a ton of gel, then you have to let your eyes do all the talking.
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18 Side Swept This neat, side-swept style looks polished and disguises any awkward hair length.
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19 Choppy Layers Back to blonde, Watson shows off her choppy lob at the MTV Movie Awards.
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20 Crown Braid A laidback crown braid for the MTV Video Music Awards in 2012.
Jenna Rosenstein is the Beauty Director at BAZAAR.com. While attending NYU, she held internships at Women’s Wear Daily, Bloomingdale’s, Harper’s BAZAAR (as Glenda’s intern!) and Allure, the latter of which she parlayed into her first job as the Beauty Assistant. She left Allure three years later as the Senior Beauty Editor, spent a few months at Refinery29 in the same title overseeing branded content, before finally landing back at BAZAAR to oversee all digital beauty content. When she's not testing every lipstick known to mankind, getting zapped by new lasers, or interviewing experts and celebrities, you can find Rosenstein re-watching Star Wars movies, reading books about new discoveries in science and health, and playing with her Bombay cat named Maddie.
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