X Factor honcho Simon watched the show before telling fans that he thought girl band Miss Dynamix should have been saved by the judges.
He tweeted: "I would have kept Miss Dynamix. I don't get that decision."
I would have kept miss dynamix. I don't get that decision.— Simon Cowell (@SimonCowell) October 28, 2013
Miss Dynamix found themselves in the bottom two on Saturday night following the 'Flash Vote', and Hannah received the least public votes last night.
Taking to the stage first for the sing off was Miss Dynamix - made up of Jeanette Akua, SeSe Foster and Rielle Carrington - and they performed Swedish House Mafia's 'Don't You Worry Child'.
Hannah then sung her 'save me song', Emeli Sande's 'Read All About It'.
Gary Barlow, the groups' mentor, saved Miss Dynamix, however Sharon Osbourne Nicole Scherzinger and Louis Walsh chose to send the girls home.
Although no longer on the UK judging panel, Simon is keeping a close eye on this year's contestants - and he seems pretty impressed with a handful of them.
He also tweeted: "On the UK X Factor show I see three acts who will go on to sell records. A couple more if they dig deep can do the same."