Who among the following has been named as the world's richest female according to the Forbes magazine?

Singer Rihanna of age 31 is named as the world's richest female according to the Forbes magazine with an estimated fortune of $600 million. She overtook Madonna and Beyonce who topped the list previously. She is from Barbados. She is the owner of Fenty Beauty, a cosmetics brand. She is also the first woman to have a clothing range with French company Moet Hennessy Louis Vuitton (LVMH).