Q102 Jingle Ball at the Wells Fargo Center, Philadelphia, PA December 5, 2012 OneRepublic, The Wanted, Karmin, Bridgit Mendler, Hot Chelle Rae, Ed Sheeran, Cher Lloyd and Olly Murs Backstage at the 2012 Q102 Jingle Ball – Rockin’ in Philly By Jackie Speiss and Deborah Wagner When Q102’s Jingle Ball holiday concert rocked Philadelphia the other night, some of music’s big stars hit the stage in front of nearly nineteen thousand screaming fans.  The star-studded lineup brought B