Question: when was the last time louis won the x factor

title: Louis Walsh
text: He has been a judge on The X Factor since the show 's inception in 2004 ( with the exception of 2015 , when he left the show only to return in 2016 ) . He has mentored the `` Groups '' category six times and the `` Overs '' category three times . He was the winning judge of the show 's second series , mentoring Shayne Ward . He has also appeared on You 're a Star , Popstars and Popstars : The Rivals . Walsh has also guest judged on Britain 's Got Talent a number of times and on The X Factor USA in 2012 . He will also be a judge on the upcoming first series of Ireland 's Got Talent , which will start airing in 2018 . 

Answer: answer: Louis Walsh has been a judge on The X Factor, and he was the winning judge of the show 's second series , mentoring Shayne Ward .
answer: Louis Walsh was the winning judge of the show 's second series.