Biography: John Birks "Dizzy" Gillespie (/ɡɪˈlɛspi/; October 21, 1917 – January 6, 1993) was an American jazz trumpeter, bandleader, composer, and singer. Gillespie was a trumpet virtuoso and improviser, building on the virtuoso style of Roy Eldridge[2] but adding layers of harmonic and rhythmic...