By Jen Heger - Breaking Celebrity News Assistant Managing Editor

Brooke Mueller is out of rehab, and told Breaking Celebrity News exclusively that the death of her ex-hubby, Charlie Sheen's friend/assistant, Rick Calamaro allegedly from a drug overdose, should be a "wake-up call" to all addicts.

Mueller went back to rehab at the end of May to seek treatment for her well documented battle with crack cocaine addiction, and was released a few weeks ago.

The mother of Sheen's two adorable twin sons, told Breaking Celebrity News: "The death of Charlie's assistant should be a wake up call for anyone struggling with addiction."

Brooke looked beautiful and healthy during an outing with a friend in Beverly Hills on Friday.

Mueller is focused on her sobriety and has a sober living companion that will be staying with her to ensure she stays on the straight and narrow this time.