Simon Cowell Responds to Demi Lovato's Return to 'X Factor'
Description:Demi Lovato was the youngest panelist on last season's the 'X Factor'. The star proved that she has the chops for the gig, and will return as a judge for season 3 of the singing competition. So what does Simon Cowell think? After all, he was constantly taking jabs at Demi for her mentoring skills.(1:02)