1. Sia, "Chandelier"
Directed by Sia and Daniel Askill
It's easy to see why the notoriously stage-shy Sia was a fan of 11-year-old reality star Maddie Ziegler. Here, the Dance Moms alum's crisp moves and theatrical mugging were a great fit for Ryan Heffington's imaginative choreography. But it's not only Ziegler's charisma that makes this video mesmerizing: Her dancing makes your memory tingle, with every gesture recalling ordinary activities that you can't exactly place. Each familiar movement is repeated until it becomes grotesque and threatening.