As Los Angeles is still reeling from the devastating wildfires that has taken so much from so many, but some of music's biggest stars came together to help raise funds for relief during FireAid.

The mega concert took place in two locations — the Intuit Dome and Kia Forum — and featured some of the most unforgettable moments and surprise collaborations in music history. Performing at the Intuit Dome were Billie Eilish, Earth, Wind & Fire, Gracie Abrams, Jelly Roll, Katy Perry, Lady Gaga, Lil Baby, Olivia Rodrigo, Peso Pluma, Rod Stewart, Stevie Wonder, Sting and Tate McRae. And taking the stage at the Kia Forum are Alanis Morissette, Anderson .Paak, Dave Matthews & John Mayer, Dawes, Graham Nash, Green Day, John Fogerty, Joni Mitchell, No Doubt, P!NK, Red Hot Chili Peppers, Stephen Stills, Stevie Nicks and The Black Crowes.

As per the FireAid website, "Contributions made to FireAid in connection with the FireAid benefit concert and other direct donations will be distributed under the advisement of the Annenberg Foundation and will be distributed for short-term relief efforts and long-term initiatives to prevent future fire disasters throughout Southern California." Donations can be made on the FireAid website.

Take a look at some of the most special moments from FireAid below.

Remaining Nirvana members reunited with special guests

Nirvana drummer Dave Grohl, bassist Krist Novoselic, rhythm guitarist Pat Smear reunited with a rotating lineup of singers to perform several songs by the band, with St. Vincent joining to perform Nevermind's "Breed," Sonic Youth's Kim Gordon taking the stage to sing Bleach's "School," and Joan Jett performing Nevermind's "Territorial Pissings." Then, Grohl's daughter Violet joined her father and his bandmates to perform "All Apologies" from In Utero.

So that's what the secret sauce is...

Yum! What do you think made it on that bun? Dirt, hair or something random and gross?