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A source close to troubled actress Lindsay Lohan tells Pop Tarts that she refuses to accept that she is going to jail, and immediately started seeking out a new attorney following the court hearing on Tuesday, in which she was sentenced to 90 days behind bars for violating the terms of her probation, stemming from her 2007 DUI arrests.

So it comes as no surprise that Shawn Chapman Holley announced her resignation from Lohan’s case on Thursday. A rep for Holley was not immediately able to comment on the reasons surrounding why she resigned.

Lohan has apparently replaced Holley with Tiffany Feder-Cohen, who was just admitted to the bar in November. We’re told that Steve Levine was recommended and in contention for the top job. Levine has experience dealing with celebrity cases, as he was on the defense team representing former jailbird, Paris Hilton, in her 2007 trial for violating the terms of her probation, which led to a 45-day prison sentence.

“It may be a money issue for Lindsay, but we’re disappointed she chose someone with limited experience in this type of situation. But in any case, she plans to file an appeal,” a Lohan pal said.

We’re also told that the 24-year-old has been advised that has the right to appeal the court’s decision, and she is entitled to bail as a matter of right.  By filing the appeal, Lohan can delay the case, and the need to turn herself in, for many months.

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But according to Santa Monica-based defense attorney, Steve Cron, all Lohan would be doing is buying time, and she still may have to endure a stint in the slammer while the appeal is being reviewed.

“She could file an appeal, but the judge will set bail and is likely to set it pretty high. Lindsay could drag it out for a few months, but it is not going to go away,” Cron said. “I highly doubt she will be successful, all she can do is buy time, spend lots of money, and be back in the same position a few months from now.”

And, in his opinion, Holley did all she could amid an “extremely difficult” situation.

“I don’t see any faults in what Lindsay’s lawyer did, she was handling a tough case with a client who repeatedly snubbed her duties. The Judge already had her mind made up on the outcome,” Cron added. “I would be shocked if any new lawyer is able to come in and change the sentence.”

Prior to her resignation, Holley issued a statement after the court’s ruling.

“Ms. Lohan and I are extremely disappointed in the sentence handed down by Judge Revel. We believe that the penalty is far harsher than what others would have received under similar circumstances,” Holley, who is based at the Los Angeles firm Kinsella Weitzman Iser Kump & Aldisert, said in a statement on Thursday. “The reality is that Ms. Lohan, like most defendants, had to balance work commitments with court requirements. To be punished so severely for doing so, particularly in light of the fact that she substantially complied with each of her probationary conditions, is harsh and unfair. That said, Ms. Lohan is prepared to serve her jail time and to comply with the Court's orders.”

Lohan, apparently, doesn’t agree.