On alternating nights, the singer coheadlines the festival with a rising band.

The coheadliners surprised the crowd by joining each other onstage for an encore.

The two bands coheadlined the summer festival, drawing massive crowds every night.

Several international acts are coheadlining the charity concert to raise funds for disaster relief.

The coheadliner invited the opening band back onstage to join them for the final encore.

Next summer, two rising bands will coheadline the festival's opening night.