More than half of voters (52.4%) in our exclusive poll named the girl group's rendition of 'Don't Let Go (Love)' by En Vogue the best performance of the night.
© Ken McKay/TalkbackThames/Rex Features
Tulisa Contostavlos's band were previously named the top act of Halloween Week and have finished as runners-up in Digital Spy's last two polls.
Last week's victor Amelia Lily came second with 15.7%, just beating Marcus Collins and his Ghostbusters-inspired performance of Jackie Wilson's '(Your Love Keeps Lifting Me) Higher and Higher', which appealed to 14.4% of viewers.
Craig Colton, however, failed to impress with his James Bond cover 'Licence To Kill', which received just 2.6% of the votes.
In our poll, Misha B just won the battle to keep out of the bottom two, with 7.6% of the vote to Janet Devlin's 7.3%.
> X Factor Movies Week - Results Show: Live Blog
> X Factor Movies Week: In Pictures
