Question: What song from Rihanna's album "Unapologetic" did pianist Tokio Myers play in semi-final 3 of the 2017 reality show "Britain's Got Talent"?
Sentence (from "Diamonds (Rihanna song)"): The song premiered on September 26, 2012, during the "Elvis Duran and the Morning Show" and was digitally released the following day as the lead single from "Unapologetic".
Relevant evidence: No