Sia once again teamed up Dance Moms‘ Maddie Ziegler, as well as a bunch of other adorable kids, to create a choir of mini-Sias housed in large white boxes ( to sing her latest single, “Elastic Heart.” Maddie took the lead as the paint-splattered choir conductor.

She’ll perform at the 2015 Grammys, airing on Sunday, February 8. Watch Sia sing “Elastic Heart”