Sia has announced she is now a proud grandmother.<br />The 44-year-old Australian star shared the news on DJ Zane Lowe's Apple Music podcast.<br />She told listeners the younger of her sons recently became the father of two new babies.<br />She said that the kids currently call her "Nana", but she is hoping they will call her "Lovey" instead.<br />Back in May, the pop singer revealed that she had adopted to sons who were "aging out of the foster care system:".
