American Idol alumna Kellie Pickler's father, Clyde, who wrapped up a three-year prison stay last May, is back behind bars. According to Us, Pickler's pop is facing multiple charges - including assault on a female, communicating threats and assault with a deadly weapon - and is being held on $20,000 bond after his wife claimed last Wednesday that he threatened her, saying, "You know that guy I stabbed in Florida that didn't die? Well, it's gonna be different this time, because you are going to die." Yeah, not the best ramp-up to Valentine's Day.