One of the last and most popular in a long line of traditional male vocalists who emerged before the rock-dominated 1960s, Johnny Mathis concentrated on romantic readings of jazz and pop standards for the ever-shrinking adult contemporary audience of the '60s and '70s. Though he debuted with a flurry of singles-chart activity, Mathis later made it big in the album market, where a dozen of his LPs hit gold or platinum and over 60 made the charts. While he concentrated on theme-oriented albums of show tunes and traditional favorites during the '60s, he began incorporating soft rock by the '70s and remained a popular concert attraction well into the '90s.