MTV.com: "Police cut short an autograph session by Jessica Simpson Thursday after thousands mobbed a Boston-area Wal-Mart. The cops pulled the plug about a half-hour after Simpson arrived, saying the crowd posed a threat to public safety.
Three teens were arrested and charged with disorderly conduct and another was charged with assault and battery, according to the Danvers Police Department's chief of police. An officer was scratched in the face trying to arrest one female fan.
Wal-Mart employees and local police were expecting between 500 and 1,000 people at the signing, but were met with more than 5,000 fans instead. State police had to shut down a section of a nearby highway because of traffic jams."