Rapper T.I. performs "Rubber Band Man." Power 96.1 threw its annual Jingle Ball party at the Gwinnett Arena on Friday, December 19, 2014. The concert lineup ran the musical gamut with T.I. (pictured), Calvin Harris, Fall Out Boy, Jessie J, Jeremih and Hoodie Allen. Robb D. Cohen/RobbsPhotos.com