Sia's Tragic Real-Life Story

Sia has been extremely open about her mental health and diagnoses she's received throughout her life. This includes her bipolar disorder diagnosis, a mental illness characterized by episodes of depression and mania. While speaking on "The Howard Stern Show" in 2014, she quipped, "I'm fully medicated, I'm like, medicated for bipolar II to the hilt."

When Howard Stern asked Sia whether she believed the development of bipolar disorder in individuals to be something they're born with or a result of a distressing childhood, the singer gave her theory. "I don't think it's f***ed up childhood in my case ... I refrain from blaming anything on my parents. I think that everyone does their best and that if they didn't do their best, they're just sick, too," she explained. Instead, Sia believes that she "smoked too much pot as a kid," and that dabbling with marijuana at the age of 13 was why her bipolar disorder developed. While more research is still needed to determine the exact cause of certain mental illnesses, it is understood that bipolar disorder originates primarily from genetic factors. However, environmental factors do play a part as well.

If you or someone you know needs help with mental health, please contact the Crisis Text Line by texting HOME to 741741, call the National Alliance on Mental Illness helpline at 1-800-950-NAMI (6264), or visit the National Institute of Mental Health website.