Lindsay Lohan Lovely Pictures

Hollywood actress Lindsay Lohan has successfully passed two drug tests and is trying her best to stay clean.

The "Mean Girls" actress was ordered by a court for random screening as part of the conditions of her recent probation hearing for driving under the influence of alcohol.

The 23-year-old was also ordered by the court to wear a SCRAM (Secure Continuous Remote Alcohol Monitor) bracelet on her ankle to monitor her body's alcohol levels every 30 minutes.