Billie Eilish and Finneas, Olivia Rodrigo, Earth, Wind & Fire, Gracie Abrams, Green Day, Jelly Roll, Joni Mitchell, Katy Perry, Lady Gaga, Lil Baby, Pink, Red Hot Chili Peppers, Rod Stewart, Sting, Stevie Nicks and Tate McRae are among those performing at the dueling shows at L.

The FireAid benefit was fueled by some of music’s best performers to raise money for Los Angeles-area wildfire relief efforts.

Billie Eilish made a surprise appearance on stage with Green Day on Thursday to kick off one of two star-studded concerts in Los Angeles put together to raise funds for people affected by deadly wildfires in California this month.

The all-star FireAid benefit in Los Angeles began with Green Day and Billie Eilish teaming up for the 'American Idiot' deep cut "Last Night on Earth."

Recap of FireAid LA from Billie Eilish, Gracie Abrams and Tate McRae to Katy Perry and all of the surprise guests.

FireAid LA brought together a powerhouse lineup at the Kia Forum and Intuit Dome in Inglewood to support relief efforts for the devastating wildfires that have claimed 29 lives and caused billions in damage.

FireAid, featuring Billie Eilish, Lady Gaga, Sting, Red Hot Chili Peppers and others in a fundraiser for Los Angeles-area wildfire relief efforts, is the latest event to combine music and philanthropy

St. Vincent performs with Krist Novoselic of Nirvana onstage during the FireAid Benefit Concert for California Fire Relief. (John Shearer/Getty Images for FireAid)

FireAid, a star-studded benefit concert raised millions for LA wildfire victims. The event featured emotional performances, including a surprise Nirvana reunion, Lady Gaga debuting a new song, and Billy Crystal hosting with humor.

The star-studded gigs were held simultaneously at the Intuit Dome and Kia Forum in Inglewood, California to help raise funds for the communities impacted by the wildfires that devastated the state earlier this month.

Pop stars, first responders, rock stars and those who’ve lost everything in the devastating LA-area wildfires came together for FireAid, a massive benefit concert Thursday that combined spectacular performances with moving storytelling from survivors and reminders of the destruction.