Kellie Pickler has been added to the line-up for GAC's Music City Keep on Playin' -- A Benefit for Flood Relief concert, taking place Sunday, May 16th at Nashville's Ryman Auditorium. GAC will air the concert live that night at 7:00 CST, but you can be there in person. Tickets are on sale now at Opry.com, by phone at 1-800-SEE-OPRY (733-6779), or at the Ryman Auditorium Box Office. Brad Paisley, Lady Antebellum, Dierks Bentley and Rodney Atkins have already been announced for the concert. Money raised during the show will go to the Community Foundation of Middle Tennessee, earmarked for fund relief.