The feud between Paris Hilton and Nicole Richie has apparently caused further disruption to The Simple Life.

Richie is said to have told producers that she would withdraw her scenes from the show unless Hilton returned to the US for wrap filming. Nicole was apparently furious after learning that her former friend has been skinny dipping at Cannes while deadlines for the reality series are fast approaching.

Friends of the pair claim that Nicole is feeling emotional after breaking up with fiance Adam Goldstein.

"Some mutual friends of Paris and Nicole - who have dared to keep in touch with both of them - were raving about the Nikki Beach party," a source told the Daily Star.

"Paris led a late-night skinny dipping session that's been the talk of Hollywood and has raised her stakes in the gossip scale - while Nicole's broken up with the man she was about to marry. So she just blew up."