"California, Los Angeles, Altadena, the Palisades - we are in this together," Green Day's frontman Billie Joe Armstrong screamed to a sold-out crowd at L.A.'s Kia Forum on Thursday for the FireAid wildfire benefit concert.

Green Day and Alanis Morissette set the tone at the FireAid benefit with songs of hope and resilience. Then came Anderson .Paak, who turned the stage at the Kia Forum into a California celebration, bringing out legendary musician Sheila E.

FireAid took over The Forum with superstar performances from Stevie Nicks, Dr. Dre, Nirvana and more to support wildfire relief and recovery.

Nirvana, Lady Gaga, Billie Eilish, Green Day, Stevie Nicks, No Doubt and more performed at the Los Angeles benefit concert FireAid.

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.

Here are some of FireAid's outstanding moments: Crystal appeared as the first host in the same clothes he was wearing when he fled his family home, which was lost in the Palisades Fire. Then, with his trademark humor and heart, he recalled another national spasm of pain.

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.

Some of the best moments included a rousing speech from Billy Crystal and sets by the Red Hot Chili Peppers and the surviving members of Nirvana.

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.

In the past few weeks, people have been planning many, many benefits for the victims of the recent Los Angeles wildfires. The biggest of those shows went down last night: FireAid, a gigantic all-star spectacular that took over both the Intuit Dome and the Kia Forum.

Pink, who always dials it up to 100, performed Janis Joplin's “Me and Bobby McGee” and Led Zeppelin's “Babe I'm Gonna Leave You.” While introducing John Mayer, she addresses the crowd: “Ladies and gentlemen, and every other gender which absolutely exists,” seemingly a reference to President Trump's “two gender” declaration.

Two concerts collectively referred to as FireAid kicked off at the Kia Forum and the Intuit Dome in the city of Inglewood in Los Angeles County to support relief efforts in the wake of the deadly wildfires that ignited earlier this month in the LA area, claiming 29 lives and causing billions of dollars in damage.