Mario Lopez Confirmed As ‘The X Factor’ Season 3 Host, Khloe Kardashian Not Returning April 22, 2013 News, The X Factor (US) Fox has officially announced that Mario Lopez is returning to host the third season of The X Factor, but his co-host Khloe Kardashian will not be by his side. The network confirmed today that the reality star is not returning for a second round of hosting duties. “I’m looking forward to returning to THE X FACTOR team,” said Lopez in a statement. “We’re coming back stronger and better than ever and I’m excited to check out all the new talent.” Lopez will be joined by judges Simon Cowell and Demi Lovato. As previously reported, former judges Britney Spears and L.A. Reid are out, leaving two open spaces at the judges’ table that have yet to be filled. In addition to his duties as The X Factor host, Lopez also hosts the evening entertainment program Extra and the nationwide Clear Channel radio show, “On with Mario Lopez.” Season three of The X-Factor is set to debut Fall 2013 on Fox.