We saw some spectacular performances, as well as that Adele rendition - yes, we're trying to block it out too. Plus there was Rita's hair, which drew a fair few comparisons.
Digital Spy was watching along, and rounded up the best Twitter reactions of the evening.
A lot of people were missing Dermot:
Don't get me wrong I love olly and caroline but I miss dermot. He was so smooth when it came to presenting. #XFactor
— noreen (@xitsnoreen) October 31, 2015
Gotta be said...olly and caroline do a great job but i miss my dermy.... @radioleary #XFactor
— Natalie (@TillieDawn) October 31, 2015
Really missing @radioleary on the X Factor! Having two presenters is weird.
— Kit Gauger (@KatGauger) October 31, 2015
I'm no expert on X-Factor, but Olly Murs and his