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OTRC: Kelly Osbourne talks weight, Bristol Palin

Kelly Osbourne speaks to OnTheRedcarpet.com after 'Dancing With the Stars' contestants' peformances on Nov. 1, 2010.

Kelly Osbourne says "Dancing With the Stars", the ABC ballroom dancing show she participated in last year, is the main reason she slimmed down to a size 2.

The 26-year-old, who appeared heftier when she starred with her rocker-father Ozzy in the reality series The Osbournes several years ago, is set to soon showcase her weight loss by appearing on the cover of Shape magazine in a bikini.

"If it wasn't for you, I would be standing here, Mr. Van Amstel," Osbourne told OnTheRedCarpet.com earlier this week, looking at her former Dancing With the Stars partner, pro-dancer Louis Van Amstel. "He changed my life as well as the show did. He got me eating right. He got me working out. He's a huge part of the reason that I changed."

Osbourne, who placed third on Dancing With the Stars, said she was moved to tears when she saw the first photo from her Shape photoshoot.

"I did my first bikini shot that I've ever done in my life and it was one of the most fantastic experiences," she told the Access Hollywood program. "It was a bit of an emotional rollercoaster because I never thought that would be me or I'd ever look like that. I can't wait for you to see the magazine the shoot, it made me cry when I saw the first picture."

Osbourne posed nearly naked and covered in gold body paint for a photoshoot spoofing Shirley Eaton's role in the James Bond film Goldfinger to promote the UK television network Sky's new HD channel package.

Osbourne also praises current Dancing With the Stars contestant Bristol Palin, the daughter of former governor of Alaska Sarah Palin.

"People better vote for her because she's what the show is all about," Osbourne said about Bristol Palin. "She's had no experience dancing before, let alone performing experience and she's just getting better and better every week and I applaud her."