Grimmy told him he was the person that everyone would be talking about and Simon said he would remember his audition for a very long time.
Seann certainly made an impression on the Judges but we wanted to find out more. Here are a few things you didn't know about our antipodean singer.
For the first time in X Factor history, viewers can vote via hashtag on Twitter to determine which of the Judges is allocated each of the four categories – the Girls, Boys, Groups and Overs.
Tweet a hashtag with the name of the judge followed by the category you would like to see them mentor.
Voting is now open.
Following The X Factor’s triumphant return to ITV, our Judges were back this evening with more talent, more sass and more surprises!
So, just what's got our Cheryl so upset? Here are our top five moments...