Platinum selling producer, Mantra, who has produced for Future and Rihanna, has produced J. Carlyle‘s new single, “Forever Girl,” pulling in vocals from Nigerian-born, Great Adamz. J Carlyle said, “the Caribbean/Afrobeat sound made me think I needed to get Great Adamz – evidently, it’s worked out beautifully.” Fresh off his video/single for “Man of Action,” which premiered over GRM Daily surpassing 25,000 views and 50,000 digital streaming platform spins, J Carlyle shows his…