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Grammy award winning musician Kid Rock, American Idol contestant and country musician Kellie Pickler and musician Zack Brown entertain troops stationed at Kandahar, Afghanistan during the 2008 USO Holiday Tour. Tour host U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, along with his wife Deborah, welcomed comedians John Bowman, Kathleen Madigan and Lewis Black; actress Tichina Arnold on the tour bringing music and entertainment to service members and their families stationed overseas. (DoD photo by Mass Communication Specialist 1st Class Chad J. McNeeley/Released)