Although it’s being billed as a Teen Festival, Summer Playland Festival 2012 has a great line-up that will appeal to all ages. For three days, July 6-8 2012, Playland welcomes 7 acts per day over two stages around the park. Carly Rae-Jepsen, Cobra Starship, Danny Fernandes, Dragonette, Gym Class Heroes, Hot Chelle Rae, One Republic,…