Let it not be said that Uncle Murda is unmerciful. Though his previously-featured single and mixtape title track should have served as fair Warning for those thinking of f*cking with his grind, the Brooklyn street veteran’s returned to clue in anyone who didn’t take the hint by way of an official remix. Whereas the original found him delivering his hard-bitten bars all by his lonesome, the latter finds Murda joined on the mic by two equally street-certified spitters—and Mariah Carey. Over the Tuneheadz’ reader-approved beat, a shining specimen of the almost-annoying-repeated-vocal-sample subgenre, G-Unit head honcho 50 Cent and Corporate Thug \ lend their voices to the headliner’s chorus of paper-stacking tough-talk, the former showing off his “back to back Ferraris” in a high-rolling middle verse, and the latter giving haters and snitches the evil eye on the back. Mrs. Carey? She contributes a soft, tuneful hook that sounds as out of place as… well, Mariah Carey in a roomful of gangsters. Not that the juxtaposition isn’t sorta dope in its own right. Fans can find the original version of Warning and much more on Uncle M’s street album of the same title, which has yet to receive a drop date—keep it locked!