Demi Lovato is looking back on how their traumatic time as a child actor left them being less than kind to people around them.

While discussing their upcoming documentary, Child Star, in an interview with The Hollywood Reporter , the singer and actor admitted to feeling immense guilt over how they treated people, both on set and off.

I didnt realize that child stardom could be traumatic and it isnt traumatic for everyone, but for me, it was, explained Lovato, who is now 31.

Carrying that pain prompted the one-time Disney Channel talent to act out while working on the show Sonny with a Chance and TV movie Camp Rock 2, something they say they regret to this day.

I think about people in the wardrobe department on my TV show because Id go in there in bad moods all the time, and I worry about guest stars that came on or the other actors or the people during Camp Rock 2, the Confident singer remembered.

And its easy to excuse that behavior because I was so young and in so much pain, but Im really remorseful, and thats a guilt that stays with you forever.