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. Eilish had already made a cameo to set off the event earlier in the evening,

Some of the biggest names in music, including Billie Eilish, Lady Gaga, and Green Day, played FireAid at the Kia Forum and Intuit Dome on Jan 30.

"From the bottom of our hearts, we love you Los Angeles," Billie Joe Armstrong told the crowd, "and we've got your back no matter what"

Green Day and Billie Eilish performed together, Billy Crystal spoke of the pain of losing his home in the fires, and Joni Mitchell gave a rare performance.

Billie Eilish and Finneas performed acoustic renditions of "Wildflower," "The Greatest," and "Birds of a Feather" at FireAid.

Raising money for ongoing wildfire relief efforts in Los Angeles, Green Day and Billie Eilish dueted 'Last Night On Earth' at the FireAid benefit concert.

Billie Eilish delivers a heartfelt duet with Green Day for the Los Angeles FireAid concert. Read on to know the details.

FireAid is a star-studded benefit concert organized for Los Angeles-area wildfire relief. It is being produced by Shelli, Irving, and the Azoff family with Live Nation and AEG Presents.

Green Day and Billie Eilish kicked off the massive FireAid benefit concert, a two-venue concert extravaganza that is raising money for Los Angeles-area wildfire relief efforts.

Here are some of FireAid’s outstanding moments: This is probably the closest thing to a Nirvana reunion we’ll ever see. The three surviving members — Krist Novoselic, Dave Grohl and Pat Smear — took the stage for a powerful, nostalgia-fueled performance that left the crowd in awe.

Kamala Harris and her husband Doug Emhoff drew attention from concertgoers who eagerly snapped photos and greeted them