Conversation so far:
what's one of Rihanna's business endeavours?
Rihanna's first fragrance, "Reb'l Fleur", was released in January 2011.
how does the fragrance sell?
Reb'l Fleur was a financial success and was expected to gross US$80 million at retail by the end of 2011.
how did she get into selling fragrances?
CANNOTANSWER.
what's another business endeavour?
On 30 March 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 she on Tidal with?
Including Beyonce and Jay Z, sixteen artist stakeholders (such as Kanye West, Beyonce, Madonna, Chris Martin, Nicki Minaj and more.
is Tidal successful?
CANNOTANSWER.

Question: what other business endeavours has she done?
Self-contained rewrite: Other than Tidal and "Reb'l Fleur," what other business endeavours has Rihanna done?