At first, I was like, is that Sia? She’s so tiny! No, of course it’s not Sia. It’s Maddie Ziegler from the reality show Dance Moms. That doesn’t really mean anything to me, but maybe it does to you — I’m basically a grandma when it comes to reality television. The last reality show I watched religiously may have been FOX’s Joe Millionaire all the way back in 2003. Ah, memories. But back to “Chandelier.”