Summerfest 2025 Lineup Rumors And News. Milwaukee’s summerfest, known as “the world’s largest music festival,” is set to return in 2025 with an exciting lineup featuring over 140 artists across three weekends:. Discover great performances and make amazing memories with multiple festival stages of live music, experiences, and more at summerfest.

View all festival news and rumors. Discover great performances and make amazing memories with multiple festival stages of live music, experiences, and more at summerfest.