Global superstar Diplo unveils a new track, “Look Back,” featuring DRAM—watch the video, directed by Brandon Dermer (“What Would Diplo Do?”) The song is the first to be revealed from a forthcoming EP, California, set for release this spring. California will be the first solo body of work from Diplo since 2013’s Revolution EP. Jimmy Fallon unveiled the EP’s artwork on “The Tonight Show” when Diplo, MØ and Goldlink performed…