'X Factor' Semi-Final Results: Justin Bieber, Kelly Rowland - Pictures
It was a tense hour for Amelia Lily, Marcus Collins, Misha B and Little Mix, but ultimately the British public decided on the final three acts that they wanted to see in the final showdown.
Justin Bieber and Kelly Rowland, stepping out from behind the judges' desk, provided the special guest performances across the hour.
Relive the drama from across the night with our gallery below:
Copyright: Ken McKay/TalkbackThames/Rex Features