(Photo: AP Photos; Courtesy of MSUCOM)

Diana Ross, 58, singer, and Barbara Ross-Lee, 60, physician

Barbara dreamed of becoming a dancer, but when she realized she didn't have the makings of a star, she became a doctor instead. In 1993, she was the first African-American woman to head a medical school (the Ohio University College of Osteopathic Medicine). Earlier this year, she was named dean of the New York College of Osteopathic Medicine in Old Westbury. "Most people think it's rude to mention my sister or that I'd be offended by it," Diana says. "But I love talking about her." She also doesn't mind shooting down rumors that their father actually pushed Barbara to sing and not Diana. "That was never the case," Barbara says. "I never even attempted to be a singer. But it sure was fun hanging out with the Supremes and getting into all those dance clubs."