http://mydeathspace.com/article/2009/04/17/Rachel_Wade_(19)_stabbed_Sarah_Ludemann_(18)_to_de ath_over_an_on_again,_off_again_boyfriend
This has the potential to be a good one.
Evidence of their ongoing feud:
Here is the guy they were fighting over:
http://www.myspace.com/papichuloisonit