The 60-year-old judge made the comments during tonight's (October 13) show after Maloney sang 'Alone' by Heart.
Following the performance, Louis said: "That was very cruise ship, very cabaret - it was a lazy song choice. It was a bit too cheesy for me."
Gary Barlow, who mentors Maloney on the show, responded by saying: "There's no need to make him current. Changing him is not the way to go, he's perfect the way he is."
Presenter Dermot O'Leary asked 34-year-old Maloney to comment on his own performance, and he said: "It felt good. I enjoyed it."
O'Leary then spoke to Maloney regarding what he thought about Walsh's comments, and he responded: "It doesn't bother me now - it just goes over my head."
Watch Chris Maloney perform Heart's 'Alone' below: