FireAid is projected to collect $100 million in donations to those affected by the Los Angeles fires Billie Joe Armstrong was a Billie Eilish fan well before they shared the stage at FireAid. Following the benefit concert at the Kia Forum on Thursday,

The band posted a series of pics with the "Birds of a Feather" singer after their team-up at last week's benefit that raised an estimated $100 million for wildfire relief.

Billie Joe Armstrong gushed that it was an "honor" performing with Billie Eilish at the FireAid benefit concert.