Rod Stewart, Katy Perry and Lady Gaga were just some of the famous faces who performed at FireAid on Thursday, a benefit concert raising money for those affected by the devastating Los Angeles wildfires.

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

Sting, Billie Eilish, Rod Stewart, Stevie Wonder and Lady Gaga are among the stars performing at a huge benefit concert in Los Angeles to help the area recover from recent devastating wildfires.

Follow live updates on the FireAid benefit concert, which will feature performances from Billie Eilish, Lady Gaga and more, as they raise money for Los Angeles-area wildfire victims.

Billie Eilish has joined Green Day onstage at the FireAid Benefit Concert. Watch their performance of “Last Night on Earth.”

Billie Joe Armstrong and Billie Eilish. Green Day got things started at the Kia Forum, where they surprised fans with Eilish to help them perform, "Last Night on Earth" from 2009's 21st Century Breakdown.

Sting, Billie Eilish, Rod Stewart, Stevie Wonder and Lady Gaga were among a host of A-list headliners taking part in a benefit concert for victims of the recent devastating LA wildfires on Thursday.

After their set, Green Day frontman Billy Joe Armstrong hugged Billy Crystal, who was there to welcome the crowd.

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

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.

Rod Stewart told Fox News Digital why he agreed to perform at the FireAid benefit concert, calling himself "a Californian."