The Smith Sisters attracted attention when their debut album, Bluebird, released in 1984, was produced by the late Merle Watson and featured guest appearances by top-ranked bluegrass pickers including Sam Bush, Mark O'Connor, Doc Watson, and T. Michael Coleman. But it was their octave-spanning vocal harmonies that truly showcased their musical strengths. Although they've subsequently followed their own paths, Philadelphia-born Debi Smith (December 30, 1953) and her younger sister Megan (December 29, 1958) reflected country warmth and harmonious texture as the Smith Sisters. De...