Ariana Grande is an American actress, singer, and dancer. At the age of 15 she launched her performing career on Broadway, playing the role of Charlotte in '13,' yet she's best known for her role as Cat Valentine on the Nickelodeon sitcom 'Victorious.' She is also launching her vocal career, as well as working on a spinoff of iCarly and Victorious, 'Sam & Cat.' Despite her seemingly bubbly exterior, Ariana has her demons (battling depression and an eating disorder) and she hides them well from the public.