Gus Kahn was an American lyricist born on March 21, 1886, in Germany. He immigrated to the United States with his family when he was a child. Kahn became well-known for his contributions to popular music in the early 20th century, writing lyrics for many hit songs that are still recognized today. Throughout his career, Kahn collaborated with various composers, including Walter Donaldson and Ernest R. Ball. Some of his most famous songs include "My Buddy" and "It Had to Be You." Kahn's work significantly influenced the music industry, and he remains a celebrated figure in the history of American songwriting.