Demi Lovato

Disney starlet Demi Lovato is best known for her roles in the Camp Rock film series and TV show Sonny With A Chance, as well as her blossoming pop career. Lovato has frequently spoken of her deep religious beliefs, especially during her previous relationship with Joe Jonas, and has also been recognised for her work with anti-bullying charities. In November 2010 she was admitted to a rehabilitation clinic in order to seek medical treatment for "emotional and physical issues". Lovato has had three Billboard-charting albums and 1,300,000 albums sold in the US alone. She will judge alongside Britney Spears, LA Reid and Simon Cowell on the second series of The X Factor US.