Tupac Shakur - Biggie Smalls (A.K.A. "Notorious B.I.G.")
The most explosive and bloodiest feud in music history. The former friends and hip hop stars began feuding in 1994 after Shakur was shot five times and robbed in a New York City lobby -- a shooting he accused Smalls (and friends Sean "Diddy" Combs and Andre Harrell) of setting up. The feud escalated into a full-scale war after the two rappers began recording songs full of insults and thinly veiled threats. Murders of close friends occurred and were blamed on the other's entourages. Eventually both Shakur and Smalls were shot dead within six months of each other, their still-unsolved murders leaving behind a legacy of violence and unrealized potential in their wake.