Celebrities who have lost weight

Slideshow posted in Photos | Tuesday, January 04, 2011

42 of 44: Like his sister Kelly, Jack Osbourne also shed nearly 70 lbs since 2005. Osbourne weighed 231 lbs and slimmed down to 161 lbs, but not without hard work. His new lifestyle includes jogging, rock climbing and bedtime at 11 p.m. (Pictured: Jack Osbourne on 'The Osbournes' in 2005 / Jack Osbourne in a 2010 photo posted on his sister Kelly's Twitter page.) ( Photo / MTV and twitter.com/MissKellyO)

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