Louis Daniel Armstrong, nicknamed "Satchmo", "Satch" and "Pops", is an American trumpeter, composer, singer and actor, is one of the most influential figures in jazz music. His career spanned 5 decades and many different eras in jazz history. Armstrong was born and raised in New Orleans. Famous in the 1920s as a creative cornet and trumpeter, Armstrong exerted a fundamental influence in jazz, shifting the focus of music from collective improvisation to solo performance. Around 1922, he followed his mentor, Joe "King" Oliver, to Chicago to play in the Creole Jazz Band. In Chicago, he spends time with other famous jazz musicians, reconnects with his friends Bix Beiderbecke, and spends time with Hoagy Carmichael and Lil Hardin. He made a name for himself in "cup competitions" and his fame went to group leader Fletcher Henderson.
When he was 63 years old, he replaced The Beatles on the Billboard Hot 100 list with "Hello, Dolly!" and became the oldest person to do so at the time.
