Sia has a new song, and you can get it for a $1. But that dollar is going toward husband Erik Anders Lang's new movie, "Be The Ball." The filmmaker created a Kickstarter for the movie -- supposedly about golf and spirituality -- starring Bill Murray and a bunch of professional golf players. And if the actual movie doesn't get you to kick in a little, Sia's song, "Iko Iko," surely will.

"THIS IS THE ONLY PLACE AND TIME YOU CAN EVER GET THIS SONG ON EARTH," the Kickstarter reads. "It will never be for sale ever anywhere else ever again -- get it while you can."

The video -- intended to get you interested in the project -- features not only the director himself, but Katy Perry, Selena Gomez, Chelsea Handler, Kelly Osbourne, Rosie O'Donnell, Shia LaBeouf, Cara Delevingne, Joe Jonas and, uh, Katy again ... in the shower.

A preview of the song comes in at 2:54 of the video. Take a listen, and, I don't know, support the movie!