Leona Lewis - British pop beauty Leona Lewis is an avid supporter of animals rights charities - but not enough to strip naked to help their cause.While stars such as Naomi Campbell, Mischa Barton and Alicia Silverstone have peeled off for photoshoots for People for the Ethical Treatment of Animals (Peta). The 22-year-old winner of British talent show The X Factor is adamant she's too shy to bare all.She says, "I'm not that confident! I think it's a strong statement, and I really respect it because it's for a great cause. I would love to do something for great causes like that, but I just don't think I could pose nude, because I'm not that brave."

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