With the artists blending their chart-topping, pop-rock talents for the August 8 grandstand show at the Mississippi Valley Fair, the fair's Saturday night will boast performances by Goo Goo Dolls, whose "Iris" spent 11 consecutive months on the Billboard Hot 100, and Neon Trees, whose first single "Animal" climbed to number 13 on the Billboard Hot 100 and reached number one on the Alternative Songs chart.