Iconic American singer Whitney Houston passed away on Saturday. The exact cause of the pop diva’s death may not come out for some time, but the presence of a cocktail of prescription drugs in her hotel room suggests it could be a case of accidental overdose. Here we look at some other celebrities who died, or are believed to have died, from accidental overdose:

Playboy Playmate Anna Nicole Smith died at the age of 39. She overdosed on a variety of prescription drugs while vacationing in the Bahamas.