"Supernanny" JO FROST is an expert when it comes to corralling rowdy, misbehaving children. So much so that she has authored two New York Times bestsellers -- Supernanny and Ask Supernanny -- and is busy promoting her third book, Jo Frost's Confident Baby Care: What You Need to Know for the First Year from America's Most Trusted Nanny . The British-born childcare expert sat down with ET's KEVIN FRAZIER , who is no stranger to advice from the Mary Poppins-like nanny, as she helped Kevin navigate his first year as a father with his son, SHANE . "I'm telling y'all, seriously, she got me straight," Kevin admits. "I was a little out of sorts, but Jo got me straightened out." ...