Mos Def Issues Rap Battle Challenge; Lupe Fiasco Accepts

Let’s get ready to rumble. Brooklyn rap veteran Mos Def uploaded a video calling out all of your favorite rappers, asserting himself, King Los and Black Thought against anybody. The first to respond and accept was none other than Lupe Fiasco, who tagged in Mickey Factz and SMACK/URL competitor Daylyt. The heated battle between Drake…