Sophia Bush met up with her One Tree Hill buddy Gavin DeGraw last night as she hosted and he perfomed at the third annual Origins Rocks Earth Month Concert at Webster Hall in NYC. OK! GALLERY: SOPHIA BUSH & THE REST OF THE CAST OF ONE TREE HILL CELEBRATE THE FINAL SEASON Gavin took to the stage, along with the lovely and talented Vanessa Carlton, to rock a packed house as celebrity fans like The Bachelorette's Ashley Hebert and JP Rosenbaum and Julia Stiles mingled ... Read More >>