Demi Lovato

Demetria Devonne "Demi" Lovato (born August 20, 1992) is an American singer-songwriter, musician and actress who first gained notice as Angela on the children's program Barney and Friends. She later became better known for her work in the Camp Rock movies, the Disney movie Princess Pro​tection Program and her own Disney TV series Sonny with a Chance. Lovato has also released three albums, her most notable and most personal being Unbroken, which spawned the hit singles "Skyscraper" and "Give Your Heart a Break". Lovato's fourth album, Demi, was released on May 14, 2013. The album has resulted in two singles, "Heart Attack", "Let It Go", "Neon Lights", "Made In The U.S.A.", "Nightingale", "Cool for the Summer" and "Confident"

Season 2
For season 2, Lovato mentored the Young Adults catagory, which consists of Jennel Garcia, Willie Jones, Cece Frey and Paige Thomas. She returned for season 3.

Season 3
For season 3, Lovato mentored the Girls catagory, which consisted of Rion Paige, Ellona Santiago, and Khaya Cohen. This was also Lovato's final season as she left on December 19, 2013 to focus on her music career.