Maddie Ziegler has given yet another extraordinary performance for Sia. She's featured in the singer's new video for "Big Girls Cry," but it's much different than the dancing in the videos for "Chandelier" or "Elastic Heart." This time, the camera is pulled in tight on the young dancer's face. She doesn't so much dance as she acts out the song with her face. I know it sounds bizarre, but it's really powerful. Check it out below, and if you love Sia, take a look at all the songs you may not know she's behind, plus find out why Sia performs with her back to the camera.