Rihanna's not just gorgeous, but she's striving to help others lead better lives. The pop star is currently trying to help mother-of-two Lisa Gershowitz Flynn, who has Acute Myelogenous Leukemia and is in desperate need of a bone marrow donor. She's currently trying to get the word out and is working with DKMS, the world's largest non-profit marrow donor center that helps raise awareness regarding the need for donors. "When I heard about Lisa's plight, my heart just broke," Rihanna told the press. "I need to get the word out about Lisa right away." Flynn, 41, is amazed that Rihanna is taking the time to find a donor match for her and others who could die without that help. "For Rihanna to even be thinking about helping others and putting herself out there when she is so busy with her career is tremendous," said Flynn. Stock picture by Tonya Wise/London Entertainment