All acts in the new series of the X Factor will first face just the judges in a room. If they get a 'yes' then they must go on to perform in front of 4,000 people in the Arena auditions.
There has also been some changes to the auditions, find out more here.
See the X Factor website for the latest news.
X Factor judge Gary Barlow tells a contestant on tonight's show that she has "potential beyond belief" despite being lost for words.
X Factor marks the return of Sharon Osbourne to the judging panel five years after she quit amid rumours of tension with a fellow judge.