Lindsay Lohan, Sean “Diddy” Combs, John Mayer, Pete Wentz and Alyssa Milano are among the numerous celebs tweeting their reactions to the sudden death of popular celebrity club DJ Adam Goldstein (a.k.a. DJ AM). The 36-year-old celebrity spinner was found dead in his New York City apartment early Friday.

“In complete shock,” John Mayer wrote before later adding, “We’re supposed to lose our friends to time, at an age when we’re ready to agree to the terms of having lived a long life. Not now.”

Ashton Kutcher wrote: “much love to my boy am”

Fall Out Boy rocker Pete Wentz wrote, “R.I.P. . I’m sorry to loved ones. So unexpected.”

Kelly Osbourne remarked: “I just can’t believe Adam is gone, I dont wanna believe I’m in shock. he is one of the most genuine people I’ve met.”

Adam got this tribute from pal Alyssa Milano: “May you rest in peace, Adam. You touched many with your light and will be missed like crazy…”

Lindsay Lohan Tweeted: “i can’t believe this, im in shock, why> whiy ? r.i.p adam”

Khloe Kardashian added: “Tell your loved ones you love them every chance you get. You never know when it will be the last time. God bless DJ AM. I love you…”

Katy Perry says: “rest in peace friend”

Emmy Rossum Tweeted: “RIP AM…you were love and respected and will be missed”

DJ AM, who knew addiction all to well as a recovering addict, had been tapped to host Gone Too Far, a raw MTV reality series set to premiere Monday, October 5. Theshow will offer tough-love interventions to young people battling chemical addiction. With the help of experts, DJ AM accompanies addicts on the path to recovery.

On Tuesday, DJ AM posted a message on his Twitter page, announcing that the series had just completed shooting.

“Just wrapped filming GTF in CT. Back to Dusk in AC to DJ tonight,” he wrote on August 25.

There’s been no word on what will happen to the series following news of Adam’s death.

In a candid interview with Glamour Magazine in January 2008, DJ AM opened up about his own dependency on drugs, blaming his years of addiction on an alleged abusive past at the hands of his father.

“I was probably destined to be a drug addict. I grew up in Philadelphia with a father who seemed to hate me: The verbal abuse he subjected me to was unbelievably cruel,” he told the magazine.