FEIST Metals [Cherrytree/Interscope] What’s Leslie Feist been up to since her 2007 album The Reminder? Breaking up, from the sound of things on her latest. These songs play like letters from a broken heart, delivered in the Canadian singer’s typically understated style. Her drowsy voice—which works so well on the lovely offhand pop numbers for which she’s become known (“Mushaboom,” “1234”)—requires only a slight adjustment to sound...