The singer put on a raunchy display as she performed on the show in a low-cut black dress surrounded by scantily-clad dancers.
She also sung a duet of her hit song Beautiful with X Factor runner-up Rebecca Ferguson.
Aguilera is currently promoting her new film Burlesque where she plays a cocktail waitress trying to make it big as a singer.
She also sings eight of the songs on the soundtrack including Express while co-star Cher sings two tracks.
While sales of the Burlesque soundtrack rose by 400 per cent on Play.com, other guests who appeared on X Factor this weekend also received a boost.
Rihanna saw sales of her music rise by 77 per cent while Take That's albums were up by 68 per cent.
Black Eyes Peas' music sales rose by 33 per cent and Robbie Williams' solo material also shot up by 20 per cent.
She also sung a duet of her hit song Beautiful with X Factor runner-up Rebecca Ferguson.
Aguilera is currently promoting her new film Burlesque where she plays a cocktail waitress trying to make it big as a singer.
She also sings eight of the songs on the soundtrack including Express while co-star Cher sings two tracks.
While sales of the Burlesque soundtrack rose by 400 per cent on Play.com, other guests who appeared on X Factor this weekend also received a boost.
Rihanna saw sales of her music rise by 77 per cent while Take That's albums were up by 68 per cent.
Black Eyes Peas' music sales rose by 33 per cent and Robbie Williams' solo material also shot up by 20 per cent.
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