Alan Jackson will headline a music event called Aquapalooza on Saturday (July 25) on Lake Martin in Alabama. The concert will be taped for a 90-minute special debuting Sept. 4 on CMT. The event, which takes place approximately 25 miles northwest of Auburn, Ala., is open to the public, but entry is only permitted to those with a boat. More than 3,000 boaters are expected to attend, and fans with inner tubes are encouraged to "raft up" for a front row seat. Other performers at the event include the Carter Twins, Matt Stillwell, Caitlin & Will and Jypsi.