In 2010, to promote her fourth album "Rated R", Rihanna went on 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,