Conversation so far:
What's one of Rihanna's business endeavours?
Rihanna's first fragrance, Reb'l Fleur, was released in January 2011.
How did the fragrance Reb'l Fleur by Rihanna sell?
The product became highly successful, according to Rolling Stone, Reb'l Fleur was a financial success and was expected to gross US$80 million at retail by the end of 2011.
How did Rihanna get into selling fragrances?
In 2009, Jay-Z signed a deal with Parlux Fragrances that involved launching scents for Kanye West and Rihanna.
What's another business endeavour of Rihanna?
On March 30, 2015, it was announced that Rihanna is a co-owner, with various other music artists, in the music streaming service Tidal.
What other music artists is Rihanna on Tidal with besides Rihanna?
Including Beyoncé and Jay-Z, sixteen artist stakeholders (such as Kanye West, Beyoncé, Madonna, Chris Martin, Nicki Minaj and more) co-own Tidal, with the majority owning a 3% equity stake.
Is the music streaming service Tidal successful?
Shortly after Tidal's launch the service shot to the top 20 of the U.S. iPhone Apps chart. Following criticism the app had already fallen out of the top 700.

Question: what other business endeavours has she done?
Self-contained rewrite: What other business endeavours has Rihanna done besides Tidal, and fragrances?