Billie Eilish and Finneas performed acoustic renditions of "Wildflower," "The Greatest," and "Birds of a Feather" at FireAid.

Donations can be made at fireaidla.org. Start the day smarter. Get all the news you need in your inbox each morning. So many musicians wanted to bring their spotlight to the cause, that what was initially set as a single event turned into dual concerts at the newly opened Intuit Dome and local landmark Kia Forum,