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.

"From the bottom of our hearts, we love you Los Angeles," Billie Joe Armstrong told the crowd, "and we've got your back no matter what"

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