Following their tragic deaths, Lil Peep and XXXTentacion join forces on their posthumous collaboration, “Falling Down.”

Co-written by iLoveMakonnen and co-produced by John Cunningham, Mike WiLL Made-It, and IIVI, the melancholy track was originally titled “Sunlight on Your Skin.” XXX expressed his desire to work with Peep and added his verse prior to his death, and can be heard on the track expressing remorse for not collaborating sooner.

“It came together from me and Lil Peep’s session in London when we were working on our album there,” Makonnen tells XXL. “We wrote the hook in the hotel, then went to the studio and laid the hook down on the track. We did it with a whole bunch of other songs in London, me and Lil Peep. Kinda semi-finished it, but we never really fully finalized it.”

Lil Peep died in November at the age of 21 from an accidental drug overdose. XXXTentacion was shot and killed in June—he was 21. Four suspects have been arrested and charged with his murder.

Posthumous albums from both artists are in the works. An album of unreleased material from Peep is due on Columbia Records “in the coming months,” and will presumably include “Falling Down,” reports Variety.

Prior to his death, XXX reportedly signed a $10 million deal with Empire and finished “a significant amount of material” for his album, which won’t arrive until at least October.