Demi Lovato used to wear a jacket on stage because she was embarrassed by the size of her arms.
The 'Heart Attack' hitmaker spent three-months in treatment for bulimia, a self-harming disorder and drug abuse in 2010, and has revealed her condition even influenced her on-stage attire.
The 22-year-old star recalled: "I recently saw pictures from my first tour, and I spent that whole summer performing in the heat in a red leather jacket because I was ashamed to show my arms. And that was when I was 105 pounds!"
Demi has been performing during her Neon Lights Tour and says she's got a renewed sense of self-confidence about her on-stage appearance.
She told Fitness magazine: "This tour, I've had the confidence to show my arms at every single concert. It may seem like a small thing, but for me, that's huge."
Demi has credited her boyfriend Wilmer Valderrama for helping her to fight the problems and a friend of the couple recently revealed they are getting "beyond serious" about their relationship.
The source told RadarOnline.com: "They are getting beyond serious.
"I saw them recently and she looks so happy and in love. In fact, she is hoping that he will ask him to marry her this year.
"She says that Wilmer is her soul partner and she could never see herself with anyone else."
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