Season 1 Nine Network Season 16 Nine Network , 2009 Season 17 Nine Network , 2010 Season 19 Nine Network , 2012 Season 21 Nine Network , 2014 Season 22 Nine Network , 2015 Season 23 Nine Network , 2016 Season 24 Nine Network , 2017 Season 27 Nine Network , 2020 Season 28 Nine Network , 2021