One of the great challenges faced by the events during Grammy Week, including the FireAid benefit, is how to set the proper tone: How do you have a celebratory event like big concert or awards ...

At the latter, the night is starting off strong with Billie Eilish joining Green Day for 21st Century Breakdown’s “Last Night On Earth.” Eilish walked onstage partway through the song.

The night kicked off with a haunting rendition of Last Night on Earth, a song from 2009's 21st Century Breakdown album, which felt almost as if it was made for the occasion.

Green Day and Billie Eilish provided a perfect ... after the band's Billie Joe Armstrong sang the first verse of that song, "Last Night on Earth," from the band's 2009 album "21 st Century ...

Scott Dudelson/Getty Images for FIREAID Billie Eilish and Green Day teamed up for a live rendition of ‘Last Night On Earth’ for the LA FireAid benefit concert last night (January 30).