01 World Boss Lyrics Get It: Gov't Mule Store Amazon.com iTunes Album Info Ben sings "World Boss" on the second disc of Gov't Mule's new album "Shout", featuring vocal interpretations of songs on disc one. Listen Here! Visit Mule.net and Billboard for more info. Details Format: 2xCD Released Sep 24, 2013 In the Press Examiner.com Jul 12, 2013 "New Gov't Mule album features an all-star lineup of vocalists" by Kelly Neilson. Rolling Stone Jul 12, 2013 "Gov't Mule Unveil Jim James, Elvis Costello Guest Spots on 'Shout!': Ben Harper, Dr. John, Grace Potter will also appear on new double album" by RJ Cubarrubia. Glide Magazine Jul 11, 2013 "Elvis Costello, Jim James, Ben Harper, Dr. John Interpreting Gov't Mule Songs" by Glide. Billboard Jul 11, 2013 "Gov't Mule 'Shout' Out to All-Stars On New Album" by Lars Brandle.