Tones and I has worried her fans on social media, the star taking to Facebook with an emotional admission.
The 26-year-old Dance Monkey hit maker, who just cleaned up at the ARIA Awards winning four gongs on Wednesday, said she was "hiding a big black hole" as she dealt with death threats and relentless bullying, reports News.com.au.
"With success comes judgment and opinions, this I was prepared for, but the relentless bullying that follows every proud moment tears my mind in two," she wrote on the post which attracted more than 6000 reactions and 800 comments.
It comes after Tones and I, real name Toni Watson, gave a heartfelt speech at ARIAs, removing a handwritten note from her pocket and saying she doesn't think she's the "most relatable female artist".