Demi Lovato says she's found a new strength in the past year she did not possess previously.

The singer and actress, 25, opened up about her evolution on The Show set to air on Monday, January 15.

She told Ellen how her documentary Simply Complicated allowed her to face some of her demons including her issues with an eating disorder - even though it made her feel uncomfortable.

'I've been working on myself for the past year, more so than I've ever worked on myself,' she told the chat show host.

'I've surrendered to the process of just learning to love yourself and I think it shows through my pictures.

'I post more bathing suit pictures online. I want to show my fans that it's possible that they can get to that self love too.'

And even though the Tell Me You Love Me singer still critiques her photos before deciding to post them on social media, she's in a space where she's happy with who she is and what she looks like.

'I'm a perfectionist. So I decided to post it anyways,' she said about a photo she posted on Instagram even though she didn't particularly like how her legs looked.

'I thought, 'it's me, it's who I am and I love my body. So I'm just going to post it

'I've taken away the power from the negative comments and the haters by not listening to them,' she added.

'If I do see [negativity], I just feel sorry for them because who leaves a negative comment on somebodies profile on the internet?

'You have to be kind of sad to do that so I've taken away the power and it feels great.

I posted it because I look so happy.'