Demi Lovato slams Justin Bieber at `X Factor` auditions

Demi Lovato, who currently is burning up the charts with her hit `Heart Attack`, dissed Justin Bieber during ` X Factor ` auditions this week.

`X Factor` auditions in cozy clubs!

Music reality show ‘X Factor’ is set to change its 10-year-old format. Contestants will now audition in cozy clubs, rather than in a "drab room".