http://www.lonestar.edu/library/kin_music2.htm

This was a period of excitement for American music.Plays on Broadway, motion pictures, gramophones, animated cartoonswere developed in the early century. In St. Louis, in 1904, the country celebrated the World's Fair. People came from far and near to enjoy the spectacle and the music. Nineteen ten marked the beginning the popularity of ballroom dancing. As the twentieth century approached music was lively. Enrico Caruso made records. Broadway was in full swing with musicals like Peter Pan  and The Wizard of Oz. Popular songs included Give My Regards to Broadway and Meet Me in St. Louis (written for the Louisiana Purchase Exposition.) .