Lindsay Lohan Puts Herself Under House Arrest?

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Did Lindsay Lohan arrest herself?

According to TMZ, the actress, 25, put herself on "lockdown" until her probation concludes in about two weeks -- in effect going under "house arrest" to avoid getting into yet more legal trouble.

Not exactly, the Mean Girls star's rep tells Us Weekly: "I can tell you she is very focused on completing her community service."

Adds a source of the "lockdown" claim, "They made it seem like she's locked in her bedroom and is not allowed to come out for the next 3 weeks. Definitely not true . . .She has said she's wanted to lay low and is looking forward for all of this to be over."

Lohan's road to clean, law-abiding living threatened to take a detour last week when it was reported that she grazed a pedestrian with her Porsche -- an incident she denied.

Weeks before her return to Saturday Night Live (which got mixed reviews) Lohan got a great progress report from Judge Stephanie Sautner back in February. "You're in the home stretch!" Sautner told the star.

For the third time in a row, Lohan had completed her court-mandated community service and psychotherapy sessions. "You seem to be getting your life back on track," Judge Sautner raved.