The 29-year-old released their new single "Unforgettable (Tommy's Song)" on Saturday, October 9, to pay respects to their friend Tommy Trussell III, who died in October 2019.
"I wrote this song the day after I found out that he had lost his battle with addiction. This disease is extremely cunning and powerful. I’m beyond grateful and proud to announce all net proceeds of this song will be going to @voicesriseup [The Voices Project]," the "Anyone" singer continued.
Fans and famous friends took to the comment section to offer Lovato their support.
"U have the most kind soul," one fan gushed.
"the song is beautiful baby 🥺🖤," another wrote.
"this would mean the world to him," Lovato wrote on their Instagram Story when a fan pointed out that "TOMMY IS UNFORGETTABLE" was trending worldwide on Twitter.
“Devastated. Please hold your loved ones tight. Tell them they are special and that you love them," Lovato shared on their Instagram Story when Trussell passed away. "Make sure they know it. RIP to my boo @sirtruss 🖤🖤🖤."
"Addiction is NO joke," they said at the time. "heaven gained this beautiful angel last night because of that terrible disease. I’m crushed and will always miss you @sirtruss. If you or someone you know is struggling please know it’s okay to ask for help."
The "I Love Me" singer has been candid about their own battle with addiction. The Camp Rock alum had a near-fatal overdose in 2018. They opened up in their Dancing With The Devil documentary about the experience and revealed they suffered three strokes, a heart attack, organ failure, pneumonia and was legally blind for a period of time.
An OK! insider previously spilled that Lovato is "a work in progress" and after a lot of self-reflection and therapy, the singer is learning to accept who they are. The source said it was a "relief" and "liberating" to get everything off their chest in the documentary.
Earlier this year, the Sonny With A Chance star came out as non-binary and announced that they go by they/them pronouns.