Forget that Paris Hilton and Nicole Richie have yet to resolve their differences, because Fox isn't really interested. Actually, don't forget about their feud, because that's going to be the best source of entertainment for their upcoming fourth season of The Simple Life, which we first told you about last month.

Fox Entertainment prez Peter Liguori decided he'd pick up the options on both their contracts for season four, though they haven't yet decided what the premise will be. He's gotta talk with the ladies first.

Asked whether the hotel heiress and the daughter of singer Lionel Richie had reconciled their differences, Liguori said, ”Not to my knowledge.” He said producers would figure out what direction the show would take “when we sit down, come up with a concept and talk to them.”

With security and Puppy Chow on standby.