You might not expect a comedy routine during a conversation with Robert Plant and Alison Krauss. But the rock 'n' roll lion and the bluegrass chanteuse who became an unlikely musical pair 17 years ago with their rootsy collaboration “Raising Sand” are relaxed,

British rocker Robert Plant and bluegrass star Alison Krauss are on tour again. They talk with NPR's Scott Simon about their ongoing collaboration.

But some of its songs and its singer Robert Plant will make their way to Pinewood Bowl on Wednesday. Plant will be joined by Alison Krauss doing reimagined renditions of Zeppelin cuts like “The Battle of Evermore,” “Rock & Roll,” and “When The ...