The singer and actress, who sought treatment in October 2010 for anorexia, bulimia and self-harming, told E! News that she originally recorded 'Skyscraper' before entering rehab, and decided to keep that version despite recording a new one following her recovery.
Lovato explained: "It just didn't feel the same, so we kept the original one. For me it was... so symbolic, it being the song I recorded before treatment and yet it was providing a message.
"It's so crazy the way things played out, that it ended up being my symbol and it represented what I'm trying to spread the word about: getting help and rising above any issues that [I and] my fans are dealing with."
The 18-year-old also admitted that making the video for 'Skyscraper' was a therapeutic experience for her, adding: "That video was an emotional release for me, like therapy... I kept crying, I was so emotionally invested... That's when I realised, that's what music videos are all about."
Lovato recently said that she couldn't keep treating her body badly and that she would have ended up dead if she didn't seek help.
Watch the video to 'Skyscraper' by Demi Lovato below: