BFFs Paris Hilton and Nicole Richie may have another rift on the way as copycat and jealousy issues threaten their friendship.

The heiress, 27, apparently wants to settle down and start a family as Nicole has. She is currently accompanying boyfriend Benji Madden on tour.

However, this doesn't sit well with Nicole, 26, who is dating Benji's twin brother and Good Charlotte bandmate Joel. She reportedly accuses Paris of copying her.

A source tells Star magazine, "Nicole was upset when Paris started dating Benji - it all happened too fast for her liking. Then Nicole couldn't go on tour with them because she had to stay home and look after her young daughter Harlow."

"She is furious Paris is out there gallivanting with her boyfriend and his brother. If Paris gets pregnant, Nicole is going to go ballistic. She thinks Paris copies everything she does."

Nicole and Joel became new parents on January 11 at the birth of Harlow. They recently denied plans of getting married.

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