The 'As Long As You Love Me' singer will help out judge LA Reid at the Judges' Houses stage of the competition, TMZ says.
He is thought to have taped the show in a home in Hollywood Hills yesterday.
It is not yet clear which other celebrities will be appearing as guest mentors on The X Factor USA, though rumors have suggested that Nick Jonas will be helping new judge Demi Lovato.
Last year, stars such as Rihanna and Enrique Iglesias appeared as mentors during the Judges' Houses stage.
The X Factor USA will return with its new season on Wednesday, September 12 on Fox.
Watch a promo for The X Factor USA below: