The X Factor 2010 Final: Its time for the first of this years star duets - and Matts not doing it by halves. Singing her hit single Unfaithful - Matt welcomes none .\r<br>\r<br>The X Factor 2010 Final: Its time for the first of this years star duets - and Matts not doing it by halves. Singing her hit single Unfaithful - Matt welcomes none .\r<br>\r<br>Matt Cardle performs Unfaithful with pop star Rihanna.
