 In 2010 , to further promote Rated R , Rihanna embarked upon her second worldwide tour , Last Girl on Earth Tour ( 2010 – 11 ) . " Unfaithful " , which she performed while standing on a stage set with red baroque style curtains in the background , was the thirteenth song on the set list . On December 11 , 2010 , Rihanna was invited to appear on series seven of the UK version of The X Factor to perform her new single " What 's My Name ? . She also performed " Unfaithful " with finalist Matt Cardle , who later won the series . In June 2011 , Rihanna embarked upon the Loud Tour , her third major worldwide tour . " Unfaithful " was the fourteenth song on the tour 's set list . Rihanna performed the song on a levitating stage while wearing a long yellow dress and with a fan blowing her skirt up , which Jon Bream of Minneapolis ' Star Tribune said looked " like Celine Dion delivering ' My Heart Will Go On ' on the deck of the Titanic " . The Daily Record 's Jules Boyle concluded that " tracks like ' Unfaithful ' and ' Hate That I Love You ' were suitably epic and backed with a full rock band . " 
