Ashley Judd hosts this homage to the influential singer-songwriter. Highlights include k.d. lang singing "Help Me," Diana Krall's "A Case of You," Richard Thompson's "Woodstock," Cassandra Wilson's "The Dry Cleaner from Des Moines," Shawn Colvin and Mary Chapin Carpenter's "Amelia," James Taylor's "River," Cyndi Lauper's "Carey" and Mitchell's moving orchestral version of "Both Sides Now."