Lindsay Lohan and Paris Hilton are involved in an internet fight. The pair, who used to be friends, has been exchanging insults through popular social network Facebook. Apparently, the “Mean” star has created a group called “Paris Wets Herself,” in reference to incidents where the hotel heiress is said to have peed in a sauna and in the back of a taxi cab. While Paris has hit back, developing a site entitled “Firecrotch,” to mock Lindsay’s red-hair. The two stars started their brawl because of Greek shipping heir Stavros Niarchos III, who they have both dated.