AP Photo/Mark Humphrey
Steve Martin performs with the Steep Canyon Rangers during the Bonnaroo Music and Arts Festival June 11, 2010 in Manchester, Tenn.
AP Photo/Mark Humphrey
Steve Martin, center, performs with the Steep Canyon Rangers during the Bonnaroo Music and Arts Festival June 11, 2010 in Manchester, Tenn.
AP Photo/Jeff Christensen
Caleb Followill of the band Kings of Leon performs at the Bonnaroo Music and Arts Festival in Manchester, Tenn., June 11, 2010.
AP Photo/Mark Humphrey
Zac Brown, right, and John Driskell Hopkins, left, of The Zac Brown Band, perform at the Bonnaroo Music and Arts Festival June 13, 2010 in Manchester, Tenn.
AP Photo/Mark Humphrey
Zac Brown, right, Jimmy De Martini, center, and Coy Bowles, left, of The Zac Brown Band perform at the Bonnaroo Music and Arts Festival June 13, 2010 in Manchester, Tenn.
AP Photo/Jeff Christensen
Jack Black, right, and Kyle Gass of the band Tenacious D perform at the Bonnaroo Music and Arts Festival in Manchester, Tenn., June 11, 2010.
AP Photo/Jeff Christensen
Comedian Conan O'Brien, right, appears on stage with Jack Black of the band Tenacious D at the Bonnaroo Music and Arts Festival in Manchester, Tenn., June 11, 2010.
AP Photo/Mark Humphrey
Laurent Brancowitz of the group Phoenix performs at the Bonnaroo Music and Arts Festival on Sunday, June 13, 2010 in Manchester, Tenn.
AP Photo/Jeff Christensen
Rivers Cuomo, left, and Scott Shriner of the band Weezer perform at the Bonnaroo Music and Arts Festival in Manchester, Tenn., June 12, 2010.
AP Photo/Mark Humphrey
Tori Amos waves to the crowd as she walks onto the stage during the Bonnaroo Music and Arts Festival June 11, 2010 in Manchester, Tenn.
