The Summerfest 2025 lineup has been rolling out over the past few weeks, and the festival wasted no time on Monday, announcing another headliner for the American Family Insurance Amphitheater.

Def Leppard will headline the American Family Insurance Amphitheater on June 19. Tickets go on sale Wednesday, Dec. 18 at 10 a.m. Summerfest will take place over three weekends – June 19-21 ...

Summerfest 2025 has locked in Def Leppard as the opening night headliner at the American Family Insurance Amphitheater. Leppard is the fourth amphitheater show announced for next year's Summerfest.

Hozier is headlining the American Family Insurance Amphitheater on June 20, 2025. Presale for tickets to the show starts on Thursday, Dec. 19. MILWAUKEE - Summerfest announced Hozier is bringing ...