Kellie Pickler, country music artist, sings with Air Force Airman 1st Class Nathen Brock (right), 352nd Special Operations Support Squadron cyber transport technician, during a USO Holiday Troop Visit show at Royal Air Force Mildenhall, England, Dec. 10, 2014. Pickler toured with five other celebrities and the Chairman of the Joint Chiefs of Staff to bring holiday cheer to Airmen serving abroad. (U.S. Air Force photo by Senior Airman Erin O’Shea/Released)