Ever since Katie Holmes passed up Posh’s invitation to appear on her new NBC reality show, Posh is said to be mighty pissed off at her. She’s supposedly not returning Katie Holmes’ calls and has courted sex tape star and ex-Paris Hilton wingman Kim Kardashian to appear in Katie’s stead:

A source close to the actress tells OK!, “Katie will not be doing the show.” Another insider adds, “Katie was horrified at how aggressive Posh was about getting her on. When Katie passed on the offer, Posh got really nasty and has stopped returning Katie’s calls.”

[From OK! Magazine print edition, May 21, 2007 via Sammie’s Effluvia]

Posh’s reality show looks mighty dumb. It’s filming now and includes scenes of the tiny ex pop star visiting a sex shop, going to the DMV, and getting pulled over by the cops and being let off in what was obviously a staged photo op.

If this is true and Posh is refusing to be friend with Katie, that’s mighty cold. Katie needs all the friends she can get and it’s not like she was refusing to hang with Posh because she didn’t want to be a Scientologist.

The OK! article states that Posh wanted J.Lo for her new show, but I bet that Lopez turned her down too.