Rihanna is shining bright like a diamond! 34-year-old singer and fashion mogul ranks 21st overall on Forbes’ annual list of America’s richest self-made women. Rihanna is also the only billionaire under 40 on the list. Most of Riri's money comes from her companies Fenty Beauty and Savage X Fenty and not her music. She hasn't dropped an album since 2016.