What song co-written by Sia was performed by Tokio Myers on Britain's Got Talent in semi-final 3?
Tokio Myers:  He won reality show "Britain's Got Talent" in 2017 playing Debussy's "Clair de lune", which turned into Ed Sheeran's song "Bloodstream"; Rihanna's "Diamonds" in semi-final 3; and in the final Hans Zimmer's Interstellar Theme soundtrack and Rag'n'Bone Man’s hit "Human". Diamonds (Rihanna song):  It was written by Sia Furler together with its producers, Benny Blanco and StarGate.
Diamonds