Louis Leo Prima (December 7, 1910 – August 24, 1978) was an American singer, songwriter, bandleader, and trumpeter. While rooted in New Orleans jazz, swing music, and jump blues, Prima touched on various genres throughout his career: he formed a seven-piece New Orleans-style jazz band in the late 1920s, fronted a swing combo in the 1930s and a big band group in the 1940s, helped to popularize jump blues in the late 1940s and early to mid 1950s, and performed frequently as a Vegas lounge act beginning in the 1950s.