Lindsay Lohan Ordered Back To Court

Lindsay Lohan's probabation has been revoked after she failed two court-ordered drug tests.

The troubled Mean Girls star must now appear in court on Friday to learn whether she faces further jail time.

The judge can sentence Lindsay to up to 30 days behind bars for each positive test result.

The sometime actress took to Twitter to own up to the failed drug tests, referring to them as "mishaps".

She wrote: "This was certainly a setback for me but I am taking responsibility for my actions and I'm prepared to face the consequences."

Lindsay was released from rehab last month after serving almost two weeks in jail for violating probation in a DUI case.