Alison Arngrim played a character that millions of people around world hated. But the actress says her popular character, Nellie Oleson of Little House on the Prairie, was a girl she grew to love. In her memoir turned one-woman show, Confessions of a Prairie Bitch, Arngrim says Nellie Oleson aided and protected her like no other creature, real or imagined. The much-loved actress is performing her one-woman show laced with comedy and confessions here in new york this week for the Rochester Fringe Festival. Before she hits the stage, she joins this edition of Need to Know to share more.