Get ready for claws, tears and plenty of blood in the world’s greatest TV catfight.

When badass supermodel Janice Dickinson joined Celebrity Big Brother on UK Channel 5 it was only a matter of time before things kicked off with ancient porn-banger Jenna Jameson.

And boy did it kick off. Round One started when Janice helped herself to some celery that was nesting in Jenna’s private kosher fridge. Hardly a major crime, but hey, no self-respecting tattooed cock-gobbler is gonna let that kind of thing slide.

Jenna accused Janice of disrespecting her religion, adding: “She’s gonna take it too far and get the psycho Italian shit.”

Both women were reduced to tears in the row that followed, with Janice later vowing: “Don’t give me that crap, mother-f***er!”

Janice, a favorite with viewers at FilmOn (where you can watch TV for free), is not the kind of gal to back down in a fight.

Celebrity Big Brother might be down ‘n’ dirty, but it’s the sort of must-see TV that directors of snore-fests like The X Factor can only dream about.

As Janice succinctly said on air last night: “Simon Cowell – suck my dick!”

* Keep up with Big Brother news at FilmOn.com, where there are hundreds of free TV channels.

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STOP PRESS: Janice has been given a formal warning by Celebrity Big Brother producers after pretending to spit at fellow house-mate Austin Armacost! The incident arose when the US star discovered there was no hot water left for her to have a bath. Oh the outrage!