The pop singer shared a throwback snap of her first-ever concert after performing with the same band this weekend.

Olivia Rodrigo rocked the Lollapalooza crowd by bringing out a special guest during her headlining set at the music festival. Weezer joined Rodrigo on stage Friday during her debut headlining set. Rodrigo and Weezer’s Rivers Cuomo duetted on two iconic Weezer hits: “Say It Aint So” and “Buddy Holly.”

After Lollapalooza, Rodrigo wrapped her GUTS tour shows when she played Osheaga Festival in Montreal on Aug. 1 and 3. Meanwhile, Weezer will play festivals across the country in August, September and October before heading to South America in November for three shows.