Simon Cowell Responds to Demi Lovato's Return to 'X Factor'

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.

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