Robert Plant & Alison Krauss

Led Zeppelin singer Robert Plant and award-winning bluegrass performer Alison Krauss will tour in support of their collaborative album, 'Raising Sand.' Though an unlikely pair, their album explores a variety of musical terrain, featuring songs by Tom Waits, Gene Clark, Townes Van Zandt, Little Milton Campbell, Mel Tillis, Doc Watson and the Everly Brothers, plus a cover of Page & Plant's 'Please Read the Letter.'