Sia "Chandelier"

Undoubtedly one of the best songs of the 21st Century so far, "Chandelier" is the very definition of a complete, musical package.

It opens with a minimalistic arrangement and jagged, uncentered percussion, but the anticipation explodes into a volley of synths and Sia's soaring vocals.

When Manny Marroquin, who has worked with dozens of big-name musicians, mixed the song, he knew the job: Build a sonic foundation under Sia's voice to give her the presence to shine from start to finish, and he nailed it.

Although the song's chorus sounds like a party anthem, its verses have a cold, dark story about a girl who burns her life at both ends to be the life of the party -- no matter the cost.

The video is an arthouse masterpiece, featuring 11-year-old Maddie Ziegler, who would go on to become a celebrity in her own right. The video's camera and Ziegler never stop moving for prolonged, dynamic shots that show the star tumbling and contorting through what appears to be an abandoned apartment.

Ziegler would recreate the video in a variety of settings on American television in 2014 into 2015. All the while, Sia would often have her back to the audience and appear more like a piece of the set than a part of the act.