Caroline and Olly present as the remaining would-be stars face their fourth live show. This week, the contestants' performances are themed around "love and heartbreak", with each choosing a popular song about the pain of being in love. Tomorrow's show will see yet another act eliminated following a tense sing-off. Plus, Ed Sheeran and Rudimental take to the stage with their hit single Lay It On Me.
Each X Factor judge is in charge of a different section of singers on the show. The judges do not know what section of the competition they will be in charge of until the audition process has finished. Each judge then has to pick four acts to take forward to the live section of the show. Each week the two acts with the lowest amount of public votes have to sing again in a final showdown after which the judges decide who should be eliminated. Once there are only five acts left remaining it becomes left to the public to decide who should go.