The One Direction singer's fall was linked to substance abuse, with alcohol and possible narcotics found in his room
The 'Friends' actor's death exposed Hollywood’s ketamine crisis. Once for therapy, the drug’s misuse led to his fatal overdose
Mac Miller died from an accidental overdose after unknowingly taking counterfeit pills laced with fentanyl
Whitney Houston died from accidental drowning, with cocaine use and heart disease as contributing factors
Heath Ledger died from an accidental overdose caused by the lethal combination of multiple prescription drugs
Judy Garland died from an accidental overdose of barbiturates, after decades of battling addiction