Billie Joe Armstrong says it was an "honor" to perform with "pretty awesome young lady" Billie Eilish. The 52-year-old rocker's band Green Day duetted with the 'Birds of a Feather' hitmaker on their 2009 track ‘Last Night On Earth’ at the FireAid benefit concert for victims of the Los Angeles wildfires at the Kia Forum on January 30.

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.