MusicTracks Key! – 0MPH Freestyle By Carrier - September 19, 2015 0 480 FacebookTwitterPinterestWhatsApp Atlanta’s Key! follows up his recently released single with Post Malone with another dope freestyle. Produced by Big Emm, “OMPH Freestyle” finds Key! channeling his inner Guwop / Chief Keef on the bangin’ single. Press play below. LISTEN: