Source:www.theradreport.com

There's an unlikely catfight going on between Christina Aguilera and Paris Hilton, and a not unlikely one between Paris and Nicole Richie.

No fisticuffs are involved, which sometimes happens when Paris is involved, but there are insults being hurled back and forth.

It seems that Hilton, when she became aware of Aguilera's pregnancy, announced it, against Aguilera's wishes, at LAX nightclub, and then followed up the revelation with a left-handed complement about Nicole Richie's appearance, as an expectant mom.

Read all about the non-sexual 3-way among Christina Aguilera, Paris Hilton, and Nicole Richie.