HOLLYWOOD, Calif. — DJ AM's shocking death Friday drew an immediate reaction from stars across the entertainment industry.

Here are a few of the tributes and comments that poured in on Twitter:

Lindsay Lohan: nononononono what????? i can't believe this.. i'm in shock. why? why? r.i.p. Adam

Samantha Ronson: Waiting for someone to say this isn't true.

Shanna Moakler: My deepest condolences are to DJ AM, he was a great artist and will be severely missed. My thoughts and prayers to his family and friends. My support and love goes out to Travis, as I know how hard this is for him and how close they were.

John Mayer: In complete shock ...I really want to use words right now but I can't get em. F---... 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: much love to my boy AM

Demi Moore: How fragile life is & how easy we can take it 4granted Take a moment 2appreciate all that U have &remember 2 tell those close 2 U-U luv them

Diddy: DJ AM Rest In Peace...

Shannon Elizabeth: OMG - I can't believe it-DJ AM was just found dead-he was such a sweet, amazing guy-I'm soooo sad! I pray he has peace & happiness now...

Katy Perry: rest in peace friend

Demi Lovato: R.I.P. DJ AM.... So sad... :( praying for his loved ones..

Pete Wentz: R.I.P. . I'm sorry to loved ones. So unexpected.

Kelly Osbourne: i just cant believe that adam (dj.am) is gone i dont want to believe it im in shock. he was one of the most genuine people i have ever met!

Josh Groban: I'm stunned. Rest in peace Adam.

Ryan Seacrest: So sad the hear about adam. a very kind and generous guy

Dita Von Teese: Shocked at the news of my good friend DJ AM.

Emmy Rossum: RIP AM... You were loved and respected and will be missed.

Soleil Moon Frye: Thank you for bringing so much music and inspiration to peoples lives. Rip Dj Am.

Kirstie Alley: SO SORRY TO HEAR ABOUT DJ AM...some times life seems very surreal..RIP...come back soon..regards to his family and friends

Dr. Drew Pinsky: "R.I.P. DJ AM. I lack the words to describe my feelings

Heidi Pratt: my thoughts and prayers are with DJ AM's family and friends