More at http://itv.com/xfactor - Welcome to the weird and wonderful world of Bert and his Bird. They will be back with more parts!!

More at http://itv.com/xfactor - Louis Walsh returned to the judging panel of the X Factor of being sacked by Simon Cowell.

More at http://itv.com/xfactor - What do you get if you cross a Brazilian with a Welshman?

More at http://itv.com/xfactor - Dermot O'Leary speaks of his initiation into The X Factor.

More at http://itv.com/xfactor - In this clip Dannii talks about her experience leading up to the X Factor.

More at http://itv.com/xfactor - Julie frightens the judges with her singing

More at http://itv.com/xfactor - Colin struts his stuff for the judges.

His Bird perform a song they have written themselves.

More at http://itv.com/xfactor - Asbestos Andy from Wales impresses the judges.

More at http://itv.com/xfactor - Some excerpts of people waiting in line to audition at the Emirates for X factor 4

More at http://itv.com/xfactor - Series 4 of the X Factor launched at the Emirates stadium in London.

More at http://itv.com/xfactor - This is probably the angriest contestant we've ever had on The X Factor. Rachel thinks she's got what it takes to win .....

more at http://itv.com/xfactor - Private Ryan witnessed some terrible scenes while in service in Iraq, which included the deaths of two of his closest .....

More at http://itv.com/xfactor - Maths professor John thinks he's the best singer in Wales and can sing even better than Tom Jones! Guess what Simon t .....

More at http://itv.com/xfactor - The girls from all over the country are planning to take the Spice Girls head on - do the judges feel the same?

More at http://itv.com/xfactor - Brother and Sister team Same Difference bound in with mounds of energy - but is it too much for the judges?

More at http://itv.com/xfactor - Nicky, who recently lost her father, tries her luck at the auditions - and manages to amaze even Simon!

More at http://itv.com/xfactor - Self-taught singer Zoe thinks she's got the X Factor. Unfortunately for her, the judges don't seem to agree

More at http://itv.com/xfactor - Upside down auditions

More at http://itv.com/xfactor - A sneak preview of The X Factor series 4 and one of this year's strangest entrants.