There are a lot of familiar voices on "Hands," a song released overnight to benefit the victims of the hateful attack against LGBT nightclub Pulse in June. Mary J. BligeJason DeruloSelena GomezHalsey, Imagine Dragons, Juanes, Adam Lambert, Jennifer Lopez, Kacey Musgraves, Nate Ruess, Pink, RuPaul, Prince Royce, Troye Sivan, Britney Spears, Gwen Stefani and Meghan Trainor are among the few who joined for the charity track.

"Hands" is co-written by Justin Tranter, who is working with Spears on her upcoming album. He wrote that when he heard about the massacre that killed 49 people, he rushed to Florida to help. 

"Putting this charity single together is just a way for me, and everyone involved to keep volunteering our help and promote peace and love in the world," he said in a statement.

Tranter wrote the song with Julia Michaels and BloodPop; it  was produced by BloodPop and Mark Ronson. Tyler Glenn, Ty Herndon, Mary Lambert, the Trans Chorus of Los Angeles, MNEK, Alex Newell, and Jussie Smollett also lend their vocals.

The song is available on iTunes now.