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Photos: Kelly Osbourne Then and Now

Kelly Osbourne: June 2002

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Kelly Osbourne was only 17 years old when MTV started documenting her family life on The Osbournes. The young Brit released her debut album, Shut Up!, with Epic Records that same year. With her unique style and attitude, Kelly Osbourne appeared confident to her fans, but looks can be deceiving. Here's how to be your most confident self—inside and out. 

Kelly Osbourne: May 2004

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Kelly Osbourne entered rehab in the spring of 2004 for her addiction to painkillers. In her SHAPE cover story, she says she believes her addiction was driven by self-esteem issues caused by the media's constant scrutiny over her weight. She's not the only celeb whose weight has fluctuated: See other celeb weight loss befores and afters.

Kelly Osbourne:  June 2005

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Kelly Osbourne returned to rehab one year after her first treatment. According to her mother, Sharon, Kelly's weight, not drug addiction, triggered her breakdown. What does a typical day in Kelly Osbourne's diet look like now?

Kelly Osbourne: June 2007

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Kelly Osbourne was still in the public eye after The Osbournes ended, and she continued to battle with her weight. The singer-actress hated her body but has said she had little motivation to lose weight. Get inspired to stick to your workout routine with these motivation tips from real women.

Kelly Osbourne: November 2008

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Yo-yo dieting caused extreme fluctuations in Kelly Osbourne's weight. Her unhealthy weight loss methods included everything from starvation to purging to diet pills, and every dramatic slimdown was followed by weight gain. To truly change your body and your weight, you have to have the right mindset. Here's how to get started.

Kelly Osbourne: May 2009

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Despite being young and in love with fiancé Luke Worrall, Kelly Osbourne continued to struggle with addiction and her weight. After leaving rehab for the third time in early 2009, Kelly turned to emotional eating to cope in the real world. Put an end to your emotional eating with these tips.

Kelly Osbourne: October 2009

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Kelly Osbourne credits Dancing With the Stars pro Louis van Amstel with changing her eating habits. She lost 20 pounds while on the show, but when DWTS ended, Kelly broke from her diet and workout routine and started to gain weight again. Steal body-toning secrets from Dancing With the Stars pros.

Kelly Osbourne: March 2010

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Kelly Osbourne got back on track in the spring of 2010, hitting the trails for long hikes with her mother, Sharon, and preparing to return to the gym. Kelly's workout routine has come a long way.

Kelly Osbourne: September 2010

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Despite a painful breakup from her fiancé, Kelly Osbourne stuck to her workout routine. The results were stunning. She looked amazing and confident in risqué costumes while performing with the Pussycat Dolls this fall. See how other Hollywood stars keep their figures red-carpet ready.

Kelly Osbourne: November 2010

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Kelly Osbourne complemented her new bikini body with a more elegant style. She told us that her new shape has given her the confidence to dress up. How did she do it? Then, see how more celebs stay fit and sexy. More on Kelly! Come back to tomorrow for Kelly's workout and weight loss tips.

Kelly Osbourne: December 2012

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The purple hair is nothing new, but it was Miss O’s low-cut dress that had tongues wagging on the red carpet at the VH1 Divas event. But there is one person who’s stuck on Kelly’s lavender locks, her mother! “She wishes I would go back to blond. She’ll call me, really serious, and say, 'I think it’s time for a change.' I’m like, 'Mom, you have hair the color of a fire engine,’” the middle Osbourne told Glamour earlier this month.