Jacob Collier (born 2 August 1994) is an English singer, songwriter, multi-instrumentalist, producer and educator. His music incorporates a combination of jazz and elements from other musical genres, and often features extensive use of reharmonisations and close harmony. He is known for his energetic live performances, in which he often conducts the audience to sing harmony or play percussion parts. Collier demonstrates his harmonic expertise in lectures and master classes, particularly with his detailed analyses of songs like Stevie Wonder's "Sir Duke" and his own music.
https://en.wikipedia.org/wiki/Jacob_Collier