After four decades of Garrison Keillor's wry humor and tales from Lake Wobegon, the 36-year-old Chris Thile has brought a more modern, music-first approach to the beloved show's voyage into the Great American Songbook. The virtuoso mandolinist has already added his own touch to the touring show; see him here with genre-spanning guests David Crosby, I'm With Her, and comedian Jenny Zigrino.