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

Here's how to watch the LA FireAid benefit concert, featuring performances from Billie Eilish, Lady Gaga, Olivia Rodrigo, Green Day and more.

Two concerts collectively being referred to as FireAid kicked off at the Kia Forum and the Intuit Dome in the Los Angeles city of Inglewood to support relief efforts in the wake of the deadly wildfires that ignited earlier this month in the LA area, claiming 29 lives and causing billions of dollars in damage.

The third single and music video from the singer’s highly anticipated album will premiere during a Grammy Awards commercial break.

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.

On top of Eilish and Gaga, the billing boasts the biggest names in music. Earth, Wind & Fire, Gracea Abrams, Jelly Roll, Katy Perry, Lil Baby, Olivia Rodrigo, Peso Pluma, Rod Stewart, Stevie Wonder, Sting, and Tate McRae will be joining Eilish and Gaga at the Intuit Dome.

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 show, which will take place at the Intuit Dome and Kia Forum in Inglewood, counts Billie Eilish, Lady Gaga, Olivia Rodrigo and Green Day among the many headliners.

As Southern California begins to rebuild in the wake of the wildfires, Live Nation is assembling some of Hollywood's biggest talents in support.

Follow live updates on the FireAid benefit concert, which will feature performances from Billie Eilish, Lady Gaga and more, as they raise money for Los Angeles-area wildfire victims.