TMZ is reporting that Demi Lovato has been hospitalised in L.A. after what may have been a heroin overdose . The outlet spoke to law enforcement and determined that just before noon PST on Tuesday, the singer was transported from a house in the Hollywood Hills to a hospital and is currently being treated. The LAPD confirmed to Refinery29 that a 25-year-old woman was transported by the fire department to the hospital for a possible overdose and is now in stable condition.