Just ONE day after Lindsay Lohan's probation was revoked by Judge Stephanie Sautner, the 25-year-old starlet is already making excuses for herself. 

The troubled actress was sentenced to 16 hours at the morgue between her court appearance on October 19th and her next probation hearing on November 2nd -- and she showed up late to her first day... causing the officials at the Coroner's Office to turn her away! 

lindsay lohan and shawn holley

According to TMZ, Linds was shceduled to be at the morgue at 8:00 am. At 7:40, her assistant called to say they were 10 minutes away.  By 8:20, she was still a no-show.  Eventually, the Mean Girls star showed up at 8:40 am and was turned away for her tardiness.  A rep for Lohan said she was late due to, "a combination of not knowing what entrance to go through and confusion caused by the media waiting for her arrival." Hmmmm

Related Article:  Lindsay Lohan Cuffed & Taken Into Custody!

lindsay lohan mug shot

Lohan then took to Twitter to apologize for the confusion and express her excitement for heading to her therapy session today.  "With all of the stress and pressure from yesterday and today, I've never been so happy to go to therapy!!!! Also, I'm sorry for the confusion that I may of caused to those at the Coroner's office. Won't happen again, now I know where to go! Thank you for your help."

So, do  you believe Lindsay -- or should she have gone the extra mile to MAKE SURE she was on time?!