Demi recently turned her life around after she was rushed to hospital in July 2018 following a suspected opioid overdose.
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• Demi Lovato's comeback after rocky decade in spotlight
After her near-death experience, she was hospitalised for 12 days and later checked into rehab for three months.
Speaking to Teen Vogue editor in chief Lindsay Peoples Wagner, Demi said: "What I see in the mirror [is] someone that's overcome a lot.
"I've been through a lot and I genuinely see a fighter.
"I don't see a championship winner, but I see a fighter and someone who is going to continue to fight no matter what is thrown in their way."
The talented singer is also set to star in a new Netflix movie with Will Ferrell called Eurovision, marking her first acting role since 2013.
WHERE TO GET HELP:
If you are worried about your or someone else's mental health, the best place to get help is your GP or local mental health provider. However, if you or someone else is in danger or endangering others, call 111.
If you need to talk to someone, the following free helplines operate 24/7:
DEPRESSION HELPLINE: 0800 111 757
LIFELINE: 0800 543 354
NEED TO TALK? Call or text 1737
SAMARITANS: 0800 726 666
YOUTHLINE: 0800 376 633 or text 234
ALCOHOL DRUG HELPLINE: 0800 787 797
There are lots of places to get support. For others, click here.