From Roberta Flack to Marianne Faithfull, Garth Hudson, Wayne Osmond and beyond, Billboard remembers the artists who left us this year.
SZA, Samuel L. Jackson, Serena Williams and Mustard all made cameos during the performance.
Below, find the best photos from an incredible night of music with a mission.
Check out pics of the rising girl group.
Check out photos of the Halloween costumes that musicians rocked this year.
"I have found in music and fashion a very beautiful refuge, a place of peace, a place of happiness, a place of dreams," the Colombian hitmaker said.
"Opening up for The Weeknd in Australia has been surreal!" she tells Billboard.
Here are some of the best costumes celebrities rocked to portray musicians, from Heidi Klum as Michael Jackson to MGK as Tommy Lee.
Katy Perry, Harry Styles and more have also worn some iconic looks during Spooky Season.
The show featured an all-women lineup of musician performers.
