Bille Joe Armstrong said it was an honor to "share the stage" with Billie Eilish at the FireAid benefit concert, which is expected to raise over $100 million in donations.

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 "honour" performing with Billie Eilish at the FireAid benefit concert.