Comedian and actor Billy Crystal also shared a moving story about the loss of the home he's lived in with his family for 46 years, and the power of laughter was a method of perseverance. Green Day opened up the benefit concert and were quickly joined by Eilish for a performance of the band's "Last Night on Earth" from their 2009 album "21st Century Breakdown.

Green Day opened the show with their song “Last Night on Earth,” featuring a surprise appearance by Billie Eilish, and then followed up with their anthem “Still Breathing”

Billie Eilish joined Green Day on 'Last Night on Earth' to kick off the FireAid concerts in Los Angeles to benefit wildfire relief in the city.