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.
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