Summer's Dirty Dozen

Mel Gibson. Lindsay Lohan. Taylor Momsen. See the 12 stars who were very, very naughty this summer

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LINDSAY LOHAN

When Judge Marsha Revel sentenced the troubled starlet to 90 days in jail and rehab, Lohan had a reply ready: "F– U." She later Tweeted that the manicure was "a joke" and called the judicial system "perverted" – nothing like her next gig ... playing a porn star.