(Des Moines, IA) -- Country music star Carrie Underwood is coming to this year’s Iowa State Fair. She’ll play the Iowa State Fair Grandstand on August 21st. Tickets go on sale at 10:00 a.m. Friday online at www.iowastatefair.org or by calling 800-514-3849. Carrie Underwood last played the Iowa State Fair in 2015.