When it plays: If you've watched TV, you may have heard of Nashville indie-pop singer Fleurie, whose work has been featured on Pretty Little Liars, Bones, Marvel's Cloak and Dagger, and more. Her ballad starts when Jo explains her groundbreaking medical idea to Alex and Meredith threatens to hurt Jackson if he does anything bad to Maggie. And, "out of the blue," Meredith bumps into dreamy Link.