Billie Eilish and her brother and collaborator Finneas paid tribute to Altadena, which was one of the communities devastated in the Los Angeles fires. Performing against a backdrop of the San Gabriel Mountains and Eaton Canyon,

The members of No Doubt -- Gwen Stefani, Tom Dumont, Tony Kanal and Adrian Young -- reunited at FireAid Thursday night and sang some of their biggest hits, including "Just a Girl," "Spiderwebs" and "Don't Speak."

Just as FireAid hit the five-hour mark, Billie Eilish and her brother Finneas turned down the volume for an acoustic set as the night neared its end.