Demi Lovato livin' it up at Disneyland on Easter weekend. Credit: JustDemi. Demi recently revealed to TWIST that she used to not get enough sleep and realized that how felt on the inside affected how she looked on the outside: 'I used to get dark circles under my eyes.

I remember looking in the mirror and thinking I looked so tired. So, I started putting on makeup and it went away. And that's when I realized I needed to to take care of my skin and my eyes and sleep more. As a kid I never has circles, but as I got older, it showed.'

-Source: OceanUP