Jack Johnson at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Tim Reynolds and Dave Matthews at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Willie Nelson and Neil Young at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Willie Nelson joins Grace Potter at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Willie Nelson and Grace Potter at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

John Mellencamp at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

John Mellencamp with Kenny Chesney at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

John Mellencamp with Kenny Chesney at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

John Mellencamp with Kenny Chesney at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Dave Matthews at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Grace Potter playing Hammond organ at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Grace Potter & The Nocturnals at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Grace Potter at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Grace Potter threw apples out to the Farm Aid 2012 audience

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Jamey Johnson at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Jamey Johnson at at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Willie Nelson, John Mellencamp, Neil Young, Dave Matthews and Jack Johnson

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Neil Young reads a letter from an Iowa dairy farmer

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Neil Young at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Neil Young joins wife Pegi Young onstage at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Kenny Chesney at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Kenny Chesney at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Kenny Chesney and Grace Potter at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Willie Nelson at Farm Aid

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Willie and Lukas Nelson at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Willie Nelson and friends at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)

Willie Nelson onstage at Farm Aid 2012

Farm Aid 2012 was held at Hershey Park Stadium on September 22, 2012. (Credit: Maria Ives)