NEW YORK (AP) - It's been a bad week for divorces for former "American Idol" contestants. People magazine reports Katharine McPhee has filed for divorce from Nick Cokas, her husband of six years. She was the "Idol" runner-up in 2006. This week, "Twilight" actress Nikki Reed filed for divorce from Paul McDonald after two and a half years of marriage. McDonald finished eighth on "Idol" in 2011.