Actress Demi Lovato has credited her young sister with helping her get through her darkest days in rehab last year (10).
The Disney star checked into a treatment centre to deal with a number of issues, including anorexia and bulimia, self-harming and bipolar disorder, and she has one person to thank for giving her the strength to fight through her personal struggles - Madison De La Garza - her nine-year old half-sister, who plays Eva Longoria's daughter on the hit U.S. TV show Desperate Housewives.
In an interview with U.S. news show 20/20, which will air in its entirety on Friday (21Apr11), she says, "I had to think of her (Madison) all the time when I was really, really rough. But I just kept thinking, 'OK, set this example for your little sister'.
"There were days where I didn't want to get out of bed, but looking at a picture of my little sister on my little bulletin board was one of the main things that kept me going."