During the late 19th century, Jubilee quartets emerged as a prominent genre of Black American music. Quartets gained their popularity after the official abolishment of slavery. These quartets consisted of 4 men, and rarely incorporated the use of musical instruments. Jubilee Quartets also became a part of black colleges and universities. This was a genre of music that was very performative and this enabled the schools to profit off of the quartet style of music. Some famous quartets include The Golden Gate Quartet, The Fisk Jubilee Singers, and the Mills Brothers. Jubilee music was a lot more upbeat than its preceding genres, folk, and spirituals. Quartets are where the idea of lead singers emerged. As Quartets gained popularity, mainstream or White America caught hold of the genre and began using the quartet artists for radio ads, tv performances, and war propaganda. The rhythm of jubilee music has a significant influence on the sound of modern day gospel music.