Paris and Nicole's feud still a mystery

Nicole Richie and Paris Hilton return for a fourth season of 'The Simple Life'.

Those hoping that the new season of The Simple Life will supply the answer to what is behind the Paris Hilton-Nicole Richie feud are going to be disappointed - but the former friends do toss a few darts.

"I'm the nice one, she's the evil one," says Hilton. "Some people change when they think they're a star or something and some people stay the same. I've always been the same and she's definitely not."

"Nothing happened," says a dismissive Richie. "You've never lost touch with anyone in your life?"