What where American forms of theater that encouraged popular song?

American forms of theater that encouraged popular song include vaudeville, which featured a variety of acts including singers, dancers, and comedians, often incorporating popular music of the time. Another significant form is the musical theater, particularly Broadway productions that blend storytelling with song and dance, showcasing contemporary and popular music styles. Additionally, burlesque and minstrel shows also played a role in popularizing songs and engaging audiences with catchy tunes and performances.