MusicTracks Post Malone – Go Flex [Video] By Joe Winsler - April 28, 2016 0 1103 FacebookTwitterPinterestWhatsApp Coming off the success of his Mac Miller and Lil Uzi Vert-assisted single, “Cameras,” DC favorite Post Malone returns to our pages with the visual for his most recent track, titled “Go Flex” — produced by Rex Kudo and Charlie Handsom. Watch above!