Sia shares behind-the-scenes video documenting the making of "Elastic Heart"

Sia has revealed that "Elastic Heart" is part two of a trilogy that began with "Chandelier"; as such, she's brought back the entire, same team, as well as Shia LaBeouf as an added extra.

The video features interviews and backstage footage of LaBeouf, Sia, dancer Maddie Ziegler, co-director Daniel Askill (who also worked with LaBeouf on Sigur Rós "Fjögur píanó") and choreographer Ryan Heffington.

Continuing the artistic statement that she's been making throughout her 1000 Forms Of Fear campaign, Sia's face is obscured by a bunch of bananas. When she debuted "Chandelier" on Ellen, Sia refused to show her face, and that's continued - so that the focus is on her music rather than her.

Check out the footage below.