Who were the Mills Brothers?

The Mills Brothers were an American vocal group formed in the 1920s, known for their smooth harmonies and innovative vocal techniques. The original members included brothers John, Herbert, Harry, and Donald Mills. They gained popularity for hits like "Paper Doll" and "You Always Hurt the One You Love," blending elements of jazz, pop, and traditional American music. The group had a significant influence on later vocal harmony groups and continued performing for several decades.