© Getty Singer Sia has revealed she is now a grandmother Singer Sia has revealed she has become a grandmother at 44 after adopting two teenage sons last year.The Australian star, best known for hits including Chandelier, Cheap Thrills and The Greatest, adopted two 18-year-olds who were "aging out of the care system" in 2019.Speaking to Zane Lowe on his Apple Music show on Tuesday, the star said her youngest son had "just had two babies"."I'm a grandma, I'm a f***ing grandma," she said."They call me Nana," she said. "I'm trying to get them to call me 'Lovey', like Kris [Jenner].
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