Murderer: Nicki Minaj

Album: My Beautiful Dark Twisted Fantasy
Label: Roc-A-Fella/Def Jam
Producer: Kanye West
Cold Cases: Ludacris' "My Chick Bad," Gucci Mane's "Mi Casa, Tu Casa (Remix)"

Nicki has had a ton of great guest verses, but this one was the meanest yet. Going toe-to-toe with some of the best in the game, she turned heads swiftly after unleashing this ferocious split-personality flow. No pretty Barbie smile or Taylor Swift co-signs required on this one.