(2 of 7) Celebrities and Their Causes When big names and big hearts combine, worthy causes get a glimmer of Hollywood’s spotlight. These celebrities are using their star power to shed light on organizations that make the season a little brighter for those in need. Jessica Simpson Simpson cuddles a Kenyan child during Operation Smile’s international medical mission in October 2005. "My experience in Kenya with Operation Smile was incredible. To witness the truly miraculous transformations in the lives of so many desperate needy children was both powerful and personally rewarding." http://www.operationsmile.org