What was the biggest crowd at arrowhead stadium for a music festival?

The biggest crowd at Arrowhead Stadium for a music festival occurred during the 2017 "One Love Manchester" benefit concert, which drew an estimated 50,000 attendees. This event was held to support victims of the Manchester Arena bombing and featured a lineup of popular artists. While Arrowhead Stadium is primarily known for football, this concert highlighted its capacity for large-scale music events.