KINGSTON, Jamaica — International dancehall superstar Popcaan has released a raunchy collaborative effort with dancehall star Moyann. The song entitled “Sunday” was produced by Anju Blaxx and was released on Valentine’s Day on Popcaan’s Vevo page. The single which peaked at number one on the Reggae itunes singles chart has many musical pundits excited about the prospects of it becoming a mainstream success. Both artistes have been busy promoting the single as…