The image of Louis Armstrong’s cheeks about to explode is part of the Western popular culture just as Elvis or Marilyn. As early as the 1920s, Satchmo brought the trumpet to the forefront as a solo jazz instrument and not just as part of the brass section. But his raspy warm voice is the element that made him a superstar, not just his scat singing but also his take on ballads, such as the unforgettable What A Wonderful World.