Lovato quitting US X Factor panel
Demi Lovato has confirmed she is leaving the US version of the X Factor to focus on her music career.
In an interview after Wednesday's performance show, the 21-year-old singer-actress said she wanted to return to her "roots".
Lovato plans to devote next year to touring and working on a new album.
X Factor producer-judge Simon Cowell said working with Lovato has been "fun" but the timing is right for "something new".
He would not comment on potential replacements.
This is the Heart Attack singer's second season on the judging panel of the Fox competition.
Lovato's fourth studio album, Demi, debuted at No 3 in the Billboard 200 albums chart in May.