Police are investigating a report by Paula Abdul that she was assaulted at a private party over the weekend. The claim, filed with the Hollywood police station, says the American Idol judge had been a victim of battery at about 1 a.m. on Sunday. "According to Abdul, the man at the party argued with her, grabbed her by the arm and threw her against a wall," a police spokesperson said. "She said she had sustained a concussion and spinal injuries." Abdul gave the police the man's name, but it has been withheld from the public pending further investigation.