FireAid took over The Forum and Intuit Dome on Thursday night with two stacked lineups supporting wildfire relief and recovery.
The chorus repeats: "All I need is time."
The British singer recently took a break for illness, but returned in full voice Thursday night.
Eilish and Finneas also performed "Wildflower" & "The Greatest."
The group's four-song performance featured throwback tracks, as well as a recent hit.
Hervana rode again at FireAid.
The Nashville singer brought a little country to the event benefiting Los Angeles wildfire relief efforts.
The "Greedy" singer showed her support for her second home at Thursday night's concert.
The performance featured three classics from the band's Tragic Kingdom album.
The singer-songwriting performed her hit "I Love You, I'm Sorry" before giving her own interpretation of a Counting Crows classic.
