 Complete the following phrase:  In the United Kingdom, Rihanna was invited back to series 7 of The X Factor on December 11, 2010, to perform Unfaithful with finalist Matt Cardle and a solo performance of Whats My Name?. The finale was watched by fifteen million viewers but attracted complaints, in the thousands, about Rihannas choice of outfit and sexual performance. Vivienne Patterson, director of Mediawatch UK, said I dont think it was suitable for a pre-watershed broadcast, I think thats quite clear. UKs media regulator, Ofcom, later confirmed that it had launched an investigation into the affair after 4000 complaints were registered regarding Rihanna and Christina Aguileras appearances at The X Factor finale. Rihanna performed the song with Drake for the first time at the 