Tickets are on sale now; click here to order online. A four-day pass is $130 through the end of the month; it goes up to $160 on Jan. 1.
Aldean has not been at the Florence festival since he headlined on a dreary, rainy night to open the 2011 festival. Lambert is making her first appearance since she headlined in 2010 after several years as an opening act.
The Band Perry make their first festival appearance as headliners. Their only other Florence appearance was as the opener for Alan Jackson in 2012.
The lineup is still a work in progress, but other acts on deck include rebel country rocker/rapper Colt Ford; veterans Joe Diffie, Nitty Gritty Dirt Band, Mark Chesnutt and Sawyer Brown; and newcomers Charlie Worsham and former NHL defenseman turned country singer Chad Brownlee.
Country Thunder runs April 10 to 13 at Canyon Moon Ranch, 20585 E. Price Road, off Arizona 79, in Florence.
See more music news in Thursday's Caliente.