Dua Lipa duets with Billie Joe Armstrong in San Francisco

Dua Lipa brought Green Day frontman Billie Joe Armstrong onstage at the Chase Center in San Francisco on October 12 for a duet on the band’s 2004 ballad "Wake Me When September Ends," continuing a tour tradition of spotlighting local music. The surprise appearance came during the pop star’s Radical Optimism tour stop in the city, where she has been performing a different cover tied to each venue’s musical history.

"San Francisco, how you feeling?" Lipa asked the crowd before introducing Armstrong, saying, "Every night we do a different surprise song by a local artist, and I immediately thought about San Francisco and all the incredible music that has come out of here." Armstrong hugged Lipa onstage and joined her band as the two traded vocals on the track, with Armstrong at one point calling out San Francisco to the audience.

The duet followed Lipa’s performance the night before of "Piece of My Heart," the Janis Joplin standard recorded with Big Brother and the Holding Company, underscoring the theme of local tributes across the Chase Center run. Across the Radical Optimism tour, Lipa has regularly invited guest artists to perform, pairing her set with appearances by musicians...