Songs Our Daddy Taught Us (1958)

Don and Phil Everly set the undisputed benchmark for sibling close harmony on this stripped-back roots collection. Backed only by acoustic guitars and upright bass, Don's warm, dusky lower register locks in parallel thirds and fifths with Phil's shimmering, effortless high tenor on Barbara Allen and Down in the Willow Garden, displaying an eerie vocal telepathy that influenced generations of harmony singers.