AceShowbiz - Rockers Nikki Sixx and Steven Adler are leading tributes to former Alice in Chains musician Mike Starr , who died on Tuesday, March 8. The bassist, who appeared on Dr. Drew Pinsky's U.S. TV show "Celebrity Rehab with Dr. Drew" last year, passed away aged 44 after suffering a suspected drug overdose in Utah.

Now former Guns N' Roses drummer Adler, who has also been treated for substance abuse issues, is leading tributes to his pal, writing on Twitter.com, "R.I.P. Mike Starr!! Such a sad day!" Meanwhile Motley Crue's Sixx writes, "RIP Mike Starr. Another fallen soldier to addiction..." Other stars to pay tribute and rally against drug addiction include Adler's Guns N' Roses replacement Matt Sorum, who writes, "Drugs and alcohol aren't a joke. Please take care of yourself and respect yourself. We lost Mike Starr today. Rest in Peace man."

Pinsky adds, "Devastating to hear of Mike Starr succumbing to his illness. So very sad. Our prayers are with his family," and actress Mackenzie Phillips writes, "Mike Starr was a great and troubled guy. I loved him... Rest in Peace, brother. Dope kills."