As Eminem said, “If you had one shot, one opportunity..” You get the point. A Kendrick Fan Raps…. GOOD. But seriously, this girl kills it. ¬†Ayanna, who goes by the Twitter username @AmiWinehouse¬†came well prepared when, after an initial fan proves he’s, well, a shitty fan, Kendrick picks her out of the crowd at the…