Sia says she's "always felt this extreme desire to protect" Maddie Ziegler.
The Dance Moms child star appeared in many of Sia’s music videos, including Chandelier, and danced through many of her live performances.
In an interview on The Zach Sang Show, she said: "You know I kept her off a plane that Harvey Weinstein tried to get her on. I know there's times where my insight has really made a difference, like kept her safe. Yeah, that was really disgusting."
The Cheap Thrills hitmaker said she told Melissa, Maddie’s mom: "Please don’t, do not do that, do not do that, do not do that," when the moment arrived, reports Independent.
Harvey Weinstein is currently serving a 23-year sentence in prison for sexual assault and rape.
On Tuesday it was announced women who suffered sexual misconduct and workplace harassment by the convicted rapist would receive an almost $19 million (R323.6 million) payout as part of a class-action lawsuit.