Conversation so far:
What was Justin Timberlake's first business venture?
Chi.
What was "Chi" about?
Timberlake has co-owned or provided celebrity endorsement for three restaurants in the United States: "Chi" opened in West Hollywood, California in 2003.
What other business ventures does he own?
in 2007 Timberlake purchased the run-down Big Creek Golf Course in his home town of Millington.
Does Timberlake also invest in movies?
ownership.

Question: what is timberlakes most lucrative business venture?
Self-contained rewrite: What is Justin Timberlake's most lucrative business venture?