Singer Sia’s face used to be a mystery, consistently hidden by wigs and oversized bows during her public appearances. Now, she doesn’t typically hide her visage, but admitted in a tweet that she feels insecure about her appearance and that she recently underwent a cosmetic liposuction procedure.

In a tweet on Saturday, the singer explained that a medication had caused her to put on “a lot of weight that I just can’t shift with exercise or thyroid meds so I went in for lipo today.”

In addition to her disclosure, she offered commentary on her privilege and her reasons for going under the knife.

“Please know that I am so lucky to have the resources to change the way I look and that when you see me looking crazy foxy again that I want you to know it did not come from diet and exercise,” she continued. “I want to be truthful about all of my procedures so I don’t contribute to the system that tells us we aren’t enough. I am insecure like most people and being in the public eye gives me anxiety, so I’ve made the choice to alter my appearance for my own confidence issues. Pray for me please! I love you, keep going!”

The Australian singer-songwriter, 47, didn’t share details about what parts of her body she’d altered. This isn’t the first time she’s disclosed details about her insecurities and the steps she’s taken because of them, either: In 2021, in an interview with Gabor Mate, she said that she’d undergone liposuction twice to try and remove what she saw as a double chin.

“It turned out to be muscles that I use to sing,” she said. She also said that she’d had lipo on her stomach and “it went wrong.”

“It looks like someone threw a hammer into my guts,” she said in the same interview. “I harmed myself…it’s so brutal, and I did that to myself because I’m insecure. I’m stopping doing anything, I’m not doing anything—I don’t know, maybe I will.”

Sia has been nominated for nine Grammy Awards. In 2013, in an “anti-fame manifesto” in Billboard, she wrote about her desire for anonymity and a private life.

“If anyone besides famous people knew what it was like to be a famous person, they would never want to be famous,” she wrote. “Imagine the stereotypical highly opinionated, completely uninformed mother-in-law character and apply it to every teenager with a computer in the entire world. Then add in all bored people, as well as people whose job it is to report on celebrities. Then, picture that creature, that force, criticizing you for an hour straight once a day, every day, day after day.”

Representatives for Sia did not immediately respond to a request for comment.