The document discusses three iconic 20th century artists and bands: The Beatles, Elvis Presley, and Louis Armstrong. It describes The Beatles as one of the most influential rock bands in history with record sales that dwarf some countries' GDPs. It characterizes Elvis Presley as the "King of Rock and Roll" who was a hugely influential cultural figure of the 20th century through his music that crossed racial lines. Finally, it presents Louis Armstrong as an American trumpeter and vocalist who was among the most influential figures in jazz across five decades of different jazz eras.