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 FireAid benefit concert, a one-night-only event, was held at the Intuit Dome and the Kia Forum in Los Angeles, with performances at each venue. Billie Eilish, Earth, Wind and Fire, Gracie Abrams,

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.