Demi Lovato

The ‘Heart Attack’ hitmaker believes matters of the mind should no longer be “taboo” after years of struggling with addiction and bipolar.

In 2015, the 31-year-old singer said: “I think it's important that people no longer look at mental illness as something taboo to talk about.

"The problem with mental illness is people don't look at it as a physical illness. When you think about it, the brain is actually the most complex organ in your body. We need to treat it like a physical illness and take it seriously."