This unlikely pair teamed up a few months ago and are now on a world wide tour (their first concert was at the Louisville Palace for two nights). They put out a CD called "Raising Sand". When I first heard that they were making a CD together, it seemed such an unlikely association. Robert Plant was lead singer for the immensely popular band, Led Zeppelin, back in the late sixties, early seventies. Alison Krauss has done nothing but Bluegrass since she started in the business. They actually sound pretty good together. Alison Krauss is a joy just to look at and listen to. Her voice is as clear as a bell. This is "Killing The Blues".