However, he backtracked on the comment after the performance and said: “Liked you last week, loved you this week.
“Absolute genius, it shouldn’t have worked, but it did work.”
Katie sang and danced in a 1940s style performance with a band and dancers accompanying her.
Judge Danii Minogue said: “We saw the fun Katie up there like we did in the first audition.”
She added: “Talking about choreography that was really hard what you did up there and your vocals didn’t falter either.”