[Kate!]

A lot of people on here may not have watched as far back as BB2 and BB3 but each series had a classic catfight.

BB2 Helen Adams v Narinder Kaur. I am sure some kind BB Fanatic could post a clip (Patrick, where are you?)

BB3 Jade Goody and Adele Roberts, featuring the famous Jade quote "Am I a minger?" This was a full on hotheaded bitchfest, and Alex Sibley eventually broke it up by screaming at both girls to stop it! Great viewing.