Billie Eilish made a surprise appearance on stage with Green Day on Thursday to kick off one of two star-studded concerts in Los Angeles put together to raise funds for people affected by deadly wildfires in California this month.

Mikael Wood and August Brown are at Inglewood's Intuit Dome and Kia Forum for the FireAid benefit concerts starring Billie Eilish, Lady Gaga, Green Day and Stevie Wonder, among many others.

FireAid LA brought together a powerhouse lineup at the Kia Forum and Intuit Dome in Inglewood to support relief efforts for the devastating wildfires that have claimed 29 lives and caused billions in damage.

On Jan. 30 the epic six-hour FireAid benefit concert to raise funds for wildfire relief, rebuilding, and fire prevention efforts aired and streamed simultaneously across Amazon Prime Video, Apple TV+,

Lady Gaga and her fiancé Michael Polansky wrote All I Need is Time for the FireAid benefit concert in Los Angeles - and she was emotional while performing it on stage

After almost six hours of FireAid, Lady Gaga ended the historic Los Angeles event by debuting a new song co-written with her fiance Michael Polansky, an upbeat number that she said was “just for tonight.”

The FireAid benefit concerts will be star-studded, with Stevie Wonder, Lady Gaga, and more performing. Here's how to see it all as it happens.