A lucky few enjoyed phonographs in 1907, but the most common way to hear a new song was by piano. People would trade, borrow, and collect the sheet music to their favorite songs. A popular choice was George M. Cohan's "You're a Grand Old Rag" from his hit Broadway musical George Washington, Jr. The song quickly spread beyond New York City and became a staple in piano benches across the country. Eventually, Cohan changed the title to "You're a Grand Old Flag," and the song remains a national treasure.