The Brief Chicago Youth Symphony Orchestras (CYSO) is returning to Lollapalooza for a second consecutive year after making history in 2025 as the festival's first and only orchestra to headline. But for a group of Chicago high school students, that dream is coming true for the second year in a row. Last summer, Chicago Youth Symphony Orchestras (CYSO) became the first orchestra ever to headline Lollapalooza — and remains the only one to do so. CYSO returns to Lollapalooza for encoreThe backstory:CYSO’s flagship ensemble, the Symphony Orchestra, brings together 102 students from across Chicago and beyond. Together, the young musicians will soon return to one of the biggest stages in music — in front of a hometown crowd.