Bluegrass music is a genre of American roots music that developed in the 1940s in the Appalachian region of the United States. The genre derives its name from the band Bill Monroe and the Blue Grass B

Flatt and Scruggs were an American bluegrass duo formed in 1948. The duo was formed by singer-guitarist Lester Flatt and banjo player Earl Scruggs, both of whom had been members of Bill Monroe's band,