Whitney Houston is not the first celebrity whose life ended tragically. Although the cause of death remains unknown, a history of drug abuse makes one wonder how the setback could occur before the public eye, such as experienced by other celebrieties. Michael Jackson died in 2009 due to an overdose of sleeping difficulties. Actor Heath Ledger on January 21, 2008 was found dead by accident after taking six types of pain relievers. That took a few weeks until the cause of the death of pop singer Whitney Houston is known for sure.
