The boys have been in the bottom two three times before and this evening could be their last.
There's no bottom two tonight or a sing off to save the acts, with the one singer with the fewest votes being eliminated.
Union J are Louis' last act, leaving just Gary Barlow and Nicole Scherzinger in the competition.
And Nicole has plenty to celebrate on the X Factor at present with her two remaining acts Jahmene Douglas and James Arthur co favourites at 11/8 to win the show.
Of course, Christopher Maloney could well pinch it at the last minute!
TellyMix readers meanwhile are tipping Chris to leave tonight, with the Liverpudlian bottom in our latest popularity poll.
James Arthur has taken a significant lead over the rest of the field, with Jahmene Douglas in a distant second spot.
The final three will be competing in the final next weekend in Manchester.
Vote for your X Factor favourite in our latest popularity poll below...
Browse pictures of the latest X Factor performances below…
The X Factor 2012 live shows tonight on ITV1 and ITV1HD with the semi-final results show.
There will be performances from Pink and Tulisa as well as the final elimination of the series.
There's no sing off on this evening's results, meaning act with the lowest votes will automatically get the axe.