Jimmy Buffett will be appearing at the Bonnaroo Festival in Manchester, TN on Saturday June 13th around 12 noon (not a full Buffett show). He will be joining Ilo Ferreira and the Coral Reefer All-Stars which will include Nadirah Shakoor and Mac McAnally. Tickets are available at BonnarooTickets.com (thanks to Marty for passing that along to us).
Update: Buffett is now confirmed to perform according to the Bonnaroo Festival website.