Watch Christina Aguilera's X-Factor Finale Performances (2010)

Christina Aguilera performing Burlesque on the X-Factor

Despite Christina Aguilera giving a performance of Express that made us reminisce about Britney Spear's car crash performance of Gimme more at the MTV awards, her appearance on the X-Factor seems to have done the album no end of good. Sales have reportedly increased by 400% since the weekend!

Watch her X-factor performances below.