Bruce Channel's "Hey Baby" -- a classic one-shot, number-one hit from 1962 -- is one of the many records proving that, during a period in which rock has sometimes been characterized as near death, the form was continuing to evolve in unexpected and delightful ways. An irresistible mid-tempo shuffle from the first few bars of homespun harmonica (played by Delbert McClinton), it was a seemingly effortless blend of rock, blues, country, and Cajun beats, featuring Channel's lazy, drawling vocals and an instantly catchy tune. It was perhaps too much of a natural; Channel could neve...