Jacob Collier (born 2 August 1994) is a British 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.
https://en.wikipedia.org/wiki/Jacob_Collier