This edition of Musician's Spotlight features one of the linchpins of late 20th-century American popular and folk music, the singer who popularized classic songs by writers both beloved and unknown: Joni Mitchell, Woody Guthrie, Leonard Cohen, Pete Seeger, Ian Tyson, Bob Dylan, Stephen Sondheim, Kurt Weill -- and "trad. arr. Collins." Starting with 1961's "Maid of Constant Sorrow" all the way up to 2017's "Everybody Knows" (with Stephen Stills) and into the present, her recording and performing