https://www.history.com/this-day-in-history/irving-berlin-copyrights-the-biggest-pop-song-of-the-early-20th-century?cmpid=email-hist-tdih-2023-0 [login to see] 3&om_rid=
Can you guess which song started his career?
A century ago, even before the phonograph had become a common household item, there was already a burgeoning music industry in the United States based not on the sale of recorded musical performances, but on the sale of sheet music.