What is it with high school girls fighting?

Another day--another kind of problem. New problems arise almost daily. I pray for guidance in how to deal with them to get the best results. The biggest problem I have in art class is usually with the girls--too talky. Today, as the students were silently working on a drawing assignment, a distracting noise was being made at one particular group. I made a quick response for it to stop--not expecting to have to say anything more. As I figured out later, a girl in the group made the noise again that the boy I had corrected made--yet I still thought it was him, and they thought it was funny I guess. Another girl in another table grouping, decided to start it up about the girl who made the noise--staring at her and even going so far as to call her a "bitch" loud enough for students to hear---I need to say here that the class is very quiet, other than this distraction, so everyone knows what is going on and this loud girl must have thought it her chance to get back at this girl--claiming that she was "talking about her" to the people in her group. I never heard this girl say a thing, so what would I do? get on to this rude, loud mouth girl who has a chip on her shoulder toward this pretty girl in the class. I decide to send her to a counselor, but couldn't get one on the phone--so I call her up at the end of class and tell her that I will either write an office referral or she can go see a counselor ==reminded her that this kind of behavior is unacceptable, not to mention very immature. To make a long story short, she ended up trying to get the "pretty" girl to fight her by hitting at her near the restroom--I was watching them go down the hall after class and thought everything was going to be ok--didn't see the incident happen--but i am short and the students are taller than me--so in such a crowd---anyway, the "pretty" girl goes to the counselor and complains--so I wrote the rude girl a dicipline referral and sent it on to the counselor. Trying to keep something from happening between silly girls is much more unpredictable than working with boys--I prefer to work with boys.