Demi Lovato

Singer Demi Lovato opened up about her battle with substance abuse during a concert in Brooklyn as she celebrated six years of sobriety. The 25-year-old singer celebrated six years of sobriety after entering rehab for an addiction to alcohol and an eating disorder, and during her show in Brooklyn on Friday, she took a moment to thank her fans for helping to "save (her) life", as well as encouraging other people in her situation to seek help, reports femalefirst.co.uk.