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This weekend Carnie Wilson of Wilson Phillips, Celebrity Fit Club, and Celebrity Wife Swap fame announced on Twitter that she is battling Bell's palsy - revealing her personal challenge and raising awareness about a less well known condition with a single tweet. Some celebrities reveal intimate health battles to let their fans know that their appearance may alter or that they may be taking a break from work. But many step into the spotlight for the simple altruistic reason of helping others. By doing so they save countless lives in countless ways - from encouraging early testing of health conditions to rallying donations for cutting-edge research. Click through for 7 celebrities who champion a cause! -By Dresden Shumaker
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