Rihanna has put in the effort and is now a billionaire. You can read more!Forbes reports that the singer is worth $1.7 billion. This makes her the most successful female musician in the world. But, Forbes says that her music isn't the main reason.Instead, Rihanna launched Fenty Beauty in 2017, her real name Robyn Fenty. With a mission to be more inclusive of all women, it was a huge success and has grown into a cosmetics business empire.Forbes claims that Fenty is where she has 50 percent of her fortune, and the bulk of her fortune (an estimated $1.4 billion) comes from it. Rest is tied to her spin-off lingerie business, Savage x Fenty. The remaining millions are from her music career.Rihanna's brand of beauty makes you think about Kim Kardashian and Kylie Jenner who both achieved billionaire status through their cosmetics lines and fashion collections. However, Kylie's story was a bit more controversial.Rihanna has surpassed them both and Forbes says she is now the second-richest female entertainer in the world, just behind Oprah.