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Tommy Dorsey was a jazz trombonist, bandleader, and composer who was active from the 1920s to the 1950s. He was one of the most popular bandleaders of his time, and his music was known for its swinging rhythm and catchy melodies. Dorsey's contemporaries included Benny Goodman, Glenn Miller, and Artie Shaw. These musicians were all part of the swing era, and their music helped to popularize jazz around the world.