Alan Jackson has added several tour dates to his summer itinerary. He's scheduled to perform in Lubbock, Texas, on May 14, followed by dates in Grand Prairie, Texas (May 15), Oklahoma City (16) and Beaumont, Texas (on May 17). After a handful of festival dates in June and July, Jackson will return to the road in August for two concerts each in California and North Carolina. He is also booked for Gilford, N.H., on Sept. 26 and BayFest in Mobile, Ala., on Oct. 2.