Oscar Emmanuel Peterson, CC, CQ, O.Ont. (August 15, 1925 - December 23, 2007) was a Canadian jazz pianist and composer. He was called the "Maharaja of the keyboard" by Duke Ellington, "O.P." by his friends, and was a member of jazz royalty. He released over 200 recordings, won seven Grammy Awards, and received other numerous awards and honours over the course of his career. He is considered to have been one of the greatest jazz pianists of all time, who played thousands of live concerts to audiences worldwide in a career lasting more than 65 years.

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