near-fatal heroin and fentanyl overdose in 2018, Demi Lovato has described her moderate drinking and cannabis use during addiction recovery as being “California sober.”The 28-year-old pop star was asked to talk about her return to the limelight following almost a decade of struggle with addiction during an interview with Tracy Smith on “CBS Sunday Morning.”Lovato has endured two highly publicized relapses and suffered “three strokes and a heart attack” during that time — details of which will be