Olivia Rodrigo made a surprise appearance at Lollapalooza Chicago, bringing out Weezer to perform "Buddy Holly" and "Say It Ain’t So." The collaboration was a full-circle moment for Rodrigo, who revealed Weezer was her first-ever concert. Rodrigo headlined Night 2 of the festival, which also featured acts like Bleachers, T-Pain, and Korn. The festival continues with Rüfüs Du Sol and Twice performing Saturday, and Sabrina Carpenter and A$AP Rocky closing on Sunday.

Prepared by Emily Rhodes and reviewed by editorial team.