Rihanna
Popstar and makeup mogul Rihanna was born Robyn Rihanna Fenty. She's always gone by her middle name professionally and even named her successful cosmetics line after her last name. However, her friends and family still call her Robyn. “I get kind of numb to hearing Rihanna, Rihanna, Rihanna,” she said. “When I hear Robyn, I pay attention.”