X Factor New Zealand judge Natalia Kills caused an uproar last night when she lambasted one of the show's contestants for being "disgusting" and copying her husband. Kills, whose husband Willy Moon is also a judge on the show, was booed by the studio crowd - and condemned on Twitter - when she lashed out at contestant Joe Irvine for his performance. The incident sparked fans to launch a petition to have Kills removed from the show. (Video: NZ Herald)