Sia has become as famous for her lack of visibility as for her award-winning music.
Sia responded to the piece.
The Australian artist acknowledged it's a question she has "often" asked herself since Ziegler, now 15, achieved global stardom thanks to her roles in Sia's music videos.
"I do check in with Maddie weekly about whether she wants this, and assure her if she ever wants it to stop it stops", Sia, 41, continued.
But one of her tactics for dodging celebrity has shined that very same light on someone else - 15-year-old dancer Maddie Ziegler.
Finally, she ended her series of tweets by explaining that fame has affected Maddie in a completely different way than it has affected her. They have been working together for years now and the former Dance Moms star even credits the "Chandelier" singer for helping her come out of her shell a little bit.
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The singer acknowledged the ethical concerns in allowing children to make such choices for themselves, but said "I do try to choose the best for her always". She is now touring with the 41-year-old from Adelaide.
After acknowledging that Zieger "is not afraid of fame" and cultivates a large social media following, the writer added: "In this case, the grown-up who has seen what fame can do and fears it has, perhaps unwittingly, handed it over to the child instead". "Not just myself but all directors, stage parents and agents".
Posing on a beach in front of Rangitoto before the concert on Tuesday, Ziegler told her followers she was "a little bit obsessed" with New Zealand.
Malkin attended Sia's Nostalgic for the Present tour stop in Sydney, Australia, and from what she saw it raised some questions.
That turn led Maddie to play Sia again, alongside Shia La Beouf in the clip for Elastic Heart while she also had a lead dancer role in videos for the Big Girl's Cry, Cheap Thrills and The Greatest. "If that changes, we stop", she concluded. In a thread, she reveals that she often thinks about this subject herself and says that she's protective of Maddie, her goal to empower her.
"I don't want to be critiqued about the way that I look on the Internet", she once said on Nightline.