Simon Cowell will work his magic on the groups again this year, while Demi Lovato mentors the girls, Paulina Rubio coaches the boys and Kelly Rowland polishes up the over 25s.
The 20-year-old "Heart Attack" singer mentors the girls this season.
Hometown: St. Johns, Fla.
Watch her sing.
Hometown: Northridge, Calif.
Hometown: San Lorenzo, Calif.
Hometown: New York, NY
X Factor newbie Paulina Rubio will spice up the boys category.
Hometown: West Hollywood, Calif.
Watch him sing.
Hometown: Valley Village, Calif.
Hometown: Lexington, S.C.
Hometown: St. Paul, Minn.
Destiny's Child alum Kelly Rowland brings her talents stateside, having previously mentored the over 25s on The X Factor U.K.
Hometown: Nashville, Tenn.
Hometown: Orlando, Fla.
Hometown: Clinton Township, Mich.
Having already placed One Direction and Fifth Harmony together on his show, and mentoring California pop trio Emblem3, Simon Cowell will lend his magic touch to the groups category once more.
Members: Colton Pack, Andrew Scholz and Zach Beeken
Watch them sing.
Members: Celine Polenghi, Millie Thrasher and Summer Reign
Alex & Sierra
Members: Real-life couple Alex Kinsey and Sierra Deaton
Members: Tenija, Tiara and Temperance Moton
Hometown: Wayne, Mich.
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