By Breaking Celebrity News Staff

Lindsay Lohan seems to have become a non-stop party animal.  For the third day in a row, the troubled starlet partied down in Malibu with her new BFF (and former enemy) Paris Hilton.

Saturday night's bash became Sunday morning's, and Lindsay didn't leave until 4 AM!

Lindsay very definitely didn't want to be seen when she left Paris' rented beach pad.

She pulled her hoodie up over her head, and when she got into the passenger seat of the car driving her home, she completely bent over in an effort to obscure her face.

Lindsay is still on probation for her theft and DUI convictions and has no prohibitions against partying, but it was only 10 days ago that Judge Stephanie Sautner warned her to "go back to community service and your life will be in order."

The no-nonsense justice added that she'll accept "no excuses" from Lindsay for not completing her counseling and community service requirements within the required time.