Main Square Festival returns to Arras, France from July 3-5, 2026, featuring an international lineup of 28 artists across pop, rock, hip hop, electronic, and pop rock genres. The festival will be headlined by French rapper Orelsan, alternative duo Twenty One Pilots, and pop superstar Katy Perry, showcasing artists from eight countries including Germany, Canada, United States, France, Australia, United Kingdom, New Zealand, and Algeria. This three-day music festival offers a diverse blend of mainstream and alternative acts, making it a premier destination for fans of contemporary popular music in northern France.