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.

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