Bruce Springsteen and REM kicked off the Vote for Change tour Friday night in Philadelphia.
The tour, organized to ensure George Bush is not re-elected, will last 10 days and hit the key “battleground” states.
Pennsylvania had five other concerts as part of the tour that night. Performing in Pittsburgh were James Taylor and the Dixie Chicks, no stranger to anti-Bush movements.
The tour will also hit Ohio, Michigan, North Carolina, Florida, Minnesota, Wisconsin, Iowa, Missouri, Washington, Arizona and Washington, D.C.
Pearl Jam, Jackson Browne, Bonnie Raitt, John Mellencamp are among the other artists taking part.
The November 2 election date will see Bush squaring off against Democratic Presidential nominee John Kerry.