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.

Question: what other music artists is she on Tidal with?
Self-contained rewrite: what other music artists is Rihanna on Tidal with?