At the time, ‘Uptown Funk’ had not been released in the UK, and the performance forced Mark and Bruno Mars to rush-release the single.
Speaking to NME, Mark explains the situation, stating: “I realised this girl's [Fleur’s] cover's going to come out before our own.
“So yeah, for a minute I was a little bit annoyed and then we kind of rushed ours, which is good 'cause I think whatever it took to get the song out.”
Releasing the track over four weeks earlier than originally planned hasn’t exactly done any damage though, as the song shot to number one.
Mark and Bruno are now up against ‘X Factor’ winner Ben Haenow in the battle for the Christmas number one spot.
Fleur’s performance of ‘Uptown Funk’ in the ‘X Factor’ semi-final saw her named favourite to win the competition, however she was pipped to the post by Ben, who then released a cover of OneRepublic’s ‘Something I Need’ as his winner’s song.