After testing positive for alcohol while under house arrest, Lindsay Lohan has been ordered to return to court Thursday morning for violating her probation terms. And, right on time, Lohan's media regular father, Michael Lohan, is speaking out about his daughter's inability to stay on the straight and narrow or surround herself with positive influences.

"If it's true, whatever she's doing isn't right," Lohan told PopEater's Rob Shuter. "There's a chubby English girl named Nikki who is always around her and when she is, I get a sick feeling and there is always a problem."

Just over a week ago Lohan threw a party on the roof of her Venice, California home. The troubled starlet, who was still under house arrest at that time, looked to be enjoying herself as did her friends -- Lohan was spotted drinking from a red cup while her friends enjoyed beers and wine.