On the show, host Claudia Winkleman meets talented pianists at train stations across the country before they play to passers-by while the show’s judges, pop star Mika and Chinese pianist Lang Lang, secretly watch on.
Kella, who will release his debut album in the new year, had his single co-written by British orchestrator Rosie Danvers, who has previously arranged for Noel Gallagher, Adele and Michael Kiwanuka.
Discussing what it was like to make his first album, he said: “They sent me down to RAK Studios in London.
“Some of the best string players in the world were there, reading through pages of manuscript, but I managed to get through the whole session – eight hours – just remembering it off the top of my head, because I can’t read music.
“I was 13 when I first saw a piano, now I’m 23, so I feel like I was born to do it.”
Kella will also perform at the Labour Party Conference in Liverpool this month as part of a programme demonstrating the value and impact of the UK’s creative sector.