Yesterday, Sia announced that she’s going few a through things, suffering from a condition known as Ehlers Danlos Syndrome. The syndrome causes chronic pain for the singer, and we hope she’s able to recuperate soon. In the meantime, here is one of Sia’s best live performances of “Elastic Heart” from The Voice. I picked this because I love the way her voice cracks in certain areas. There’s one line in particular that goes…”And I’m fighting for my life so bad” that she throws so much heart into. I love this song.