Mindy McCready is the fifth former cast member of “Celebrity Rehab with Dr. Drew” to die in the past two years. Alice in Chains bassist and former “Real World” cast member also appeared on the show’s third season, alongside McCready. Starr died in March 2011 at 44, while Kovar, 29, died in August 2012. “Grease” actor , 60, who appeared on the show’s first season, died of pneumonia in May 2011. However, the doctor who treated him for drug addiction for years told CNN it was his dependence on prescription painkillers that eventually cost him his life. Authorities said that Season 2 cast member death in June 2012 was the result of accidental drowning, but the alcohol, cocaine, marijuana and PCP found in the 47-year-old’s system were contributing factors.