According to Forbes, Rihanna is officially a billionaire, with an estimated net worth of $1.7 billion, making her the richest female musician.

The bulk of Rihanna's fortune comes from her cosmetics brand, Fenty Beauty, which she launched in partnership with luxury goods conglomerate LVMH in 2017. Forbes estimates that $1.4 billion of Rihanna's net worth comes from Fenty Beauty, while $270 million coming from her lingerie brand Savage X Fenty, and the remainder from her music and acting career. 

Rihanna made milestones with her LVMH partnership, which also includes her Fenty fashion line, as she is the first person since 1987 to launch a new house with LVMH, and she's the first woman to create an original brand there. In addition, Rihanna is the first woman of color at the top of an LVMH Maison.

Source: Forbes