"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.

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