The members of No Doubt -- Gwen Stefani, Tom Dumont, Tony Kanal and Adrian Young -- reunited at FireAid Thursday night and sang some of their biggest hits, including "Just a Girl," "Spiderwebs" and "Don't Speak."

A cavalcade of enormous rock and pop stars, old and new, will perform at an enormous benefit concert in Los Angeles, and streamed around the world.

When the first song of the night features record-smashing pop icon Billie Eilish out the front of pop-punk royalty Green Day, you know you're in for something special.