"She used to command USD 100,000 for club appearances, but now Kim is the hottest girl and they aren't friends anymore. The magazines are bidding around USD 300,000 for Kourtney's baby shower and baby pictures. And Khloe's wedding brought in record ratings," the source added.
Hilton has also stopped her boyfriend Doug Reinhardt seeing his friends, it has been claimed.
'The Hills' star Brody Jenner hasn't seen Reinhardt since he reconciled with the socialite in August and insists that their friendship is now over.
"We used to be best friends, now I never see him. Some people are so involved in relationships they lose their other friends. Partners come and go, your friends are there for you always. I'm done. Paris has taken him away," Jenner said.