Over the weekend, Tegan & Sara dropped their latest track from the forthcoming Heartthrob, an uptempo dance number called "I'm Not Your Hero." It's a track living within the same headspace as the previous single "Closer," which is to say that it's a big, open pop song. Hear it below. [videoembed size="full_width" alignment="center"][/videoembed] Heartthrob is out in January on Warner ...