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The singer showed off her new look back in November last year, getting rid of her long locks and opting for a cropped pixie cut instead.
Speaking on The Drew Barrymore Show this week, Lovato revealed what inspired the decision to cut her hair short.
She said: "I cut my hair because I just wanted to free myself of all of the gender and sexuality norms that were placed on me as a Christian in the South.
"And when I cut my hair, I felt so liberated because I wasn't subscribing to an idea or a belief placed upon me to be something that I'm not."
In the documentary, Lovato said: "I've had so much to say over the past two years, wanting to set the record straight about what it was that happened.
"I've had a lot of lives. Like my cat, you know? I'm on my ninth life."
"I had three strokes. I had a heart attack," Demi said.
"My doctors said that I had five to 10 more minutes.
"I crossed a line that I had never crossed."
She also spoke about her relapse in 2018, telling the camera: "I picked up a bottle of red wine that night, and it wasn't even 30 minutes before I called someone that I knew had drugs on them.
"I'm surprised I didn't OD that night."
She went on: "I tried meth. I mixed it with molly, with coke, weed, alcohol, Oxycontin. And that alone should've killed me.
"It was only two weeks before I was introduced to heroin and crack cocaine.
"I started using recreationally, and obviously, you can't do that with heroin before you become addicted to it.
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