Sia is opening up about her decision to adopt two 18-year-old boys last year, revealing that she first saw her future son on television.

In a new cover story for Vogue Australia, the 44-year-old singer-songwriter said she was watching a documentary and became touched by his story when she learned he had no family.

“I was like: ‘What? Like, he doesn’t have anybody. Oh my God. I’m going to find him and I’m going to be his mummy.’ And so that’s what I did,” she explained.

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As a result, she tracked him down and adopted the boy and his friend.

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@siamusic is our October cover star!❗The Australian musician may prefer to be concealed on stage, but as #Sia prepares to release a film she both wrote and directed, aptly titled Music, she finds herself unmasked like never before. “It’s the scariest thing I’ve ever done. Much scarier than putting out music or playing a tiny role on a TV show as a cameo or whatever … because it all fell back on me,” she explains to #VogueAustralia’s deputy editor @jesslmontague. “There were times where I thought: ‘Oh, I’m going to put this movie back on the shelf and no one will know I ever tried.’ But I’m so glad that we just tried more and never gave up and finally we found its rhythm.” In her first cover shoot for #Vogue, the singer opens up about her passion project, motherhood and wanting to make a difference. Link in bio to read more. Photographed by @micaiahcarter, styled by @nicolaformichetti, Vogue Australia, October 2020.

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Admitting that becoming a mother is “the best thing I’ve ever done,” Sia shared her plans to possibly become a foster mother as well.

“It’s one of the hardest, but I have obviously such an overflow of love that I could definitely see myself doing it again, but not for a while,” she said.

RELATED: Sia Hopes To Adopt 16-Year-Old Dasani From The HBO Doc ‘Foster’: ‘You Will Have A Home With Me’

“The next thing I’m planning to do is foster actual infants. Maybe [their mother] is drug-addicted and then I could help look after them until, you know, their mum can get back on the wagon or an adoptive home is found,” she added. “If I can do that then I think I’ll feel like I’m superhuman.”