LAS VEGAS (AP) — Singer-actress Pia Zadora was arrested at her Las Vegas home over the weekend following a rapidly escalating attempt to impose a bedtime on her teenage son. The 61-year-old entertainer, whose career peaked in the 1980s, was arrested shortly before noon Sunday, some six hours after police responded to a call at her home. The spat, which ended with the one-time blond bombshell scratching the faces of her 16-year-old son and husband, began with her attempt to hustle her son to bed so she could get some rest, according to a police report released Monday.