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

Billie Eilish made an appearance during Green Day’s set at the FireAid concert on Jan. 30. The Grammy winner came out as the ...

Billie Eilish and Finneas, Olivia Rodrigo, Earth, Wind & Fire, Gracie Abrams, Green Day, Jelly Roll, Joni Mitchell, Katy ...