Sia’s “Chandelier” already had us on our death beds a couple months ago when it came out, and after some time spent healing, we thought we might’ve made it through. But then this video, in which a young ballet dancer/ Siadoppelgänger performs an interpretive dance choreographed by the little spirit that lives inside our hearts arrived, and now we’re done for. It’s over. We had a good run. Tell our mother we loved her or whatever.