Lorde’s latest song, “Green Light,” is for the brokenhearted lovers left dancing alone on the dance floor. A soundtrack for those Saturday nights where your girls have to lure you into the Uber home. An anthem for the newly single who take a quick escape before rebuilding. A melody for those on the mend. Turn it up, shake it off, and get ready to hear the rest of the story on her forthcoming album Melodrama.