The entertainment world has been quick to respond to the attack on Orlando's Pulse nightclub, with several charity singles being released to benefit survivors and victims' families.

The latest, "Hands," features vocals from Britney Spears, RuPaul, Adam Lambert, Gwen Stefani, Troye Sivan, Jason Derulo and many other top acts.

The song was written and produced by Justin Tranter, the out singer-songwriter behind Justin Bieber's "Sorry," Selena Gomez's "Hands to Myself" and other major hits.

"Like the rest of the world I woke up to the news that morning and was horrified and sad and scared," Tranter told Billboard.

The theme of the song came just a day after the shooting, when Tranter arrived at the Center Orlando, the city's LGBT community center, and asked how he could help.

"They said, 'We need as many hands as we can possibly get.'"

The artists all recorded their segments separately—from their homes, nearby studios or wherever they happened to be at that moment.

"We assigned everybody what we thought would be the best part for their voice," Tranter says, "And we asked them all to sing an additional part, just in case. But everybody got it done in time so we ended up with extra vocals."

Spears opens the song with the line "Can hold a gun or a hold a heart," while RuPaul is heard near the end, saying "Take my hand baby."

Tranter says Pink was "a lifesaver," describing her vocals in the chours "like, from heaven directly."

Proceeds from "Hands" benefit Equality Florida's Pulse Victims Fund, the GLBT Community Center of Central Florida and GLAAD.

Below, view the full list of artists on "Hands."

Mary J Blige, Jason Derulo, Britney Spears, Tyler Glenn, Selena Gomez, Halsey, Ty Herndon, Imagine Dragons, Juanes, Adam Lambert, Mary Lambert, Jennifer Lopez, the Trans Chorus of Los Angeles, Kacey Musgraves, MNEK, Alex Newell, Pink, Prince Royce, Nate Ruess, RuPaul, Troye Sivan, Jussie Smollett, Gwen Stefani and Meghan Trainor.

h/t: Billboard