Paris Hilton had a huge fight with boyfriend Dough Reinhardt on halloween’s eve. The hotel heiress and the Hills star were enjoying a night at Heidi Klum annual costume party, but then the couple was seen arguing in the car. Doug tossed her phone out of their car, reporst the New York Post. An onlooker told the press, "She was mad. She jumped in the front seat and (Doug) was holding her around the neck saying, 'Relax, relax'." She was staggering down the street, up and down. And the guy they were with was trying to block anyone from taking pictures," said other source.