Conversation so far:
What happened in 2015?
On October 16, 2015, Usher released an interactive music video exclusively on the music streaming platform Tidal called "Chains.
did he work with anyone on it?
that featuring artist Nas and Bibi Bourelly.
.
What is Hard II Love?
The album Hard II Love.
Was the album successful?
It debuted at number 5 on the US Billboard 200, and sold 28,000 copies in the United States in its first week.
Did he go on tour?
CANNOTANSWER.
What is hands of stone?
the 2016 American-Panamanian biographical sports film Hands of Stone.
was the film popular?
CANNOTANSWER.

Question: What was his part in the film?
Self-contained rewrite: What was Usher's part in Hands of Stone?