Sia is officially a grandma

Singer-songwriter Sia famously sang about her “Elastic Heart” but it turns out her massive heart has enough space not only for two adopted children, but now, grandchildren. That’s right, the 44-years-young singer is officially a grandma after one of her children, whom she adopted last year, became a parent.“My youngest son just had two babies,” Sia announced in an interview with Zane Lowe. “I'm a f***ing grandma! I know, right!”The Aussie singer announced back in January in an interview with GQ concerning Diplo that she had adopted a son and didn’t have time for a relationship. Turns out it was two teenage boys who were aging out of the foster system. At the time they were 18 but have since turned 19.[video_embed id='5297511778001']RELATED: A Look at Which Celebs Have Decided to Adopt [/video_embed]Speaking to Lowe for an Apple Music interview, Sia admitted that she was going for a Kris Jenner vibe: “They call me ‘Nana.’ I'm trying to get them to call me ‘Lovey,’ like Kris Kardashian. I'm like, ‘Call me Lovey.’”Despite one of her kids becoming a young parent, the “Chandelier” singer said that she enforces strict rules with her brood. “I just kept really strong boundaries,” she explained. “And I would say, ‘You could do this, or you could go back to where you came from, which is not a nice life. It's not a good life,’ and I'd say, ‘I'm doing this because I'm your mother. I love you. I have no other agenda other than the fact that I love you.’”She also had some choice words for the foster care system in which her sons were stuck for most of their lives, calling it “corrupt” and saying the process has left her “a little bit jaded.” She later admitted in the interview that one of her sons is currently in therapy to process his trauma from his early developmental stages within the foster care system.“I really pray that he can manage, because it took me until I was 41, I think, to deal with my early developmental trauma,” she said. “And I don't want that for them, but you can't force anyone. Trauma has to come out when you're in a safe environment, when you're ready, psychologically ready. So, I'm just trying to do my best for them.”[video_embed id='-1']BEFORE YOU GO: Man hears 'I love you' for first time in 25-years after ear implant [/video_embed]