Check out four unforgettable collaborations that took place during the FireAid benefit concert, including a Stephen Stills-Graham Nash reunion and a duet between Stevie Wonder and Sting.

The event, set to take place on January 30, will also stream live on Apple TV, Netflix, Paramount, Prime Video, Spotify, SoundCloud and YouTube

They join Billie Eilish, Stevie Nicks, Joni Mitchel, Green Day, Red Hot Chili Peppers, Lady Gaga, Stephen Stills, and many more.

Billie Eilish, Dr. Dre, Stevie Wonder, Green Day, Joni Mitchell, No Doubt and the remaining members of Nirvana all performed.

Nirvana, Lady Gaga, Billie Eilish, Green Day, Stevie Nicks, No Doubt and more performed at the Los Angeles benefit concert FireAid.

Sting, Billie Eilish, Rod Stewart, Stevie Wonder and Lady Gaga were among a host of A-list headliners taking part in a benefit concert for victims of the recent devastating LA wildfires on Thursday.

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."

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.

The Recording Academy says it's distributed more than $4 million to musicians affected by the fires. Sunday's Grammys show is meant to raise more.

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

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