X Factor auditions

1. Manchester: Nicole Scherzinger

Nicole Scherzinger joins the other judges.

2. Manchester: Nicole Scherzinger

Nicole Scherzinger is the guest judge in Manchester.

3. Birmingham: Natalie Imbruglia

Natalie Imbruglia joins the other judges.

4. Birmingham: Natalie Imbruglia

Natalie Imbruglia is the guest judge in Birmingham.

5. Cardiff: Pixie Lott

Pixie Lott joins the other judges.

6. Cardiff: Pixie Lott

Pixie Lott as a guest judge.

7. X Factor in Cardiff

A very happy looking Pixie Lott at the X-Factor auditions in Cardiff.

8. X Factor in Cardiff

Konnie Huq poses for a photo with the fans at the X-Factor auditions.

9. X Factor in Cardiff

Konnie Huq in 'make up' at the X Factor auditions at the International Arena in Cardiff.

10. X Factor in Cardiff

Pixie Lott waves to the crowd as she arrives at the International Arena in Cardiff.

11. X Factor in Cardiff

Judge Louis Walsh at the X Factor auditions at the International Arena in Cardiff

12. X Factor in Cardiff

A summery looking Konnie Huq, the new presenter of ITV 2's X-Factor coverage.

13. Dublin: Katy Perry

14. Dublin: Katy Perry

Katy Perry joins the other judges.

15. X Factor in Dublin

Katy Perry arrives in Dublin to be a guest judge on the X-Factor auditions. What we to know is who is the most stylish - Katy or Cheryl Cole?

16. X Factor in Dublin

Cheryl Cole or should that be Tweedy arrives at the X-Factor auditions in Dublin.

17. X Factor in Dublin

Louis pulls a funny face with fans outside the Dublin Convention Centre.

18. X Factor in Dublin

Simon has his picture taken with fans outside the Dublin Convention Centre.

19. X Factor in Dublin

Katy looking stunning in a pale blue sequin dress...but does she look more stylish than Cheryl?

20. X Factor in Dublin

Celebrity X-Factor Judge Katy Perry outside the Dublin Convention Centre.

21. X Factor in Dublin

Simon has his picture taken with fans outside the Dublin Convention Centre.

22. X Factor in Dublin

Katy poses for the photographers in Dublin

23. X Factor in Dublin

Fans wait for a glimpse of the judges in Dublin

24. X Factor in Dublin

Katy makes her way through the massive crowds outside the Convention Centre in Dublin.

25. X Factor in Dublin

Simon of course just opted for the white t-shirt!

26. X Factor in Dublin

Simon gives the crowd a wave before the auditions get underway.

27. X Factor in Dubli

Katy poses for a photo with some excited fans in Dublin.

28. X Factor in Dublin

29. X Factor in Dublin

Cheryl wearing a khaki playsuit and black belt.

30. X Factor in Dublin

X-Factor fans outside the Dublin Convention Centre. Are the next JEdward amongst them?

31. X Factor in Dublin

32. X Factor in Dublin

33. X Factor in Dublin

Cheryl stops for a photo with the fans

34. X Factor in Dublin

Katy is the latest celebrity to be a guest judge during the auditions phase.

35. X Factor in Dublin

X-Factor fan Angela Doonan outside the Dublin Convention Centre

36. Glasgow: Geri Halliwell

Geri Halliwell joins the other judges.

37. Glasgow: Geri Halliwell

Geri Halliwell was the guest judge in Glasgow.