Lallycooler Festival takes place July 10-11, 2026 in Sioux Falls, South Dakota, featuring headliners Darius Rucker and Jason Derulo. This two-day music festival showcases a diverse lineup spanning country, pop, honky tonk, rock, and singer-songwriter genres with 9 total artists performing. The festival brings together performers from the United States and Canada, offering music fans a varied weekend of live entertainment combining mainstream country and pop with traditional honky tonk and rock influences.