Summer's Dirty Dozen

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

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.