Billie Eilish and Finneas, Lady Gaga, Gracie Abrams, and more musicians are coming together to support those impacted by the Los Angeles wildfires and support the city the entertainment industry calls home.

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.

Dozens of artists, many of whom have ties to Los Angeles, are lending their talents to wildfire relief. The event will take place January 30 at both the Intuit Dome and Kia Forum, with tickets on sale January 22 at noon PST. Read on for who’s playing, who’s putting up the money to put this thing on, and where you can stream.