Nicole Richie , may fall back into self destructive behavior ?

Sources say when Good Charlotte frontman Joel Madden, 28, hits the road from April 24 until December to promote his punk band’s latest CD, Good Morning Rival, girlfriend of four months, Nicole Richie, won’t have him to lean on.

And as she faces a possible jail sentence for her DUI arrest on Dec. 11, it could be disastrous.

“Nicole has to keep her nose clean,� says a close friend. “But when she’s left to her own devices, it often spells trouble.

Meanwhile. viewers of The Simple Life will, witness a 10 minute sequence of Paris Hilton and Nicole Richie giving enemas to campers at a health camp run by fitness guru Susan Powter.

"We did it outside, so that was a lot of fun. It probably wasn't that fun for (the campers), but it was definitely interesting. It was something that I never thought I would do before," said Richie. Paris indicated she would rather milk cows.

The pair spoke briefly about how they reconciled their differences. They insist that the feud was blown out of proportion by the media. Neither would say what triggered the rift but rumour says that Hilton caught Richie showing people her sex tape.