Hip-hop is a genre that celebrates Alpha behavior, top-dog mentalities, and sometimes aggression. While not always the case, fights that start over the microphone can sometimes work their way into the real world, with disastrous consequences. Some of the feuds fizzle out with no harm done and everyone friends in the end; others, not so much. It seems like every major star has had a fight with another star at one point or another; here are nine of the biggest feuds of all time.