OUCH.

Louis Walsh was left red-faced on last night's X Factor when Thom Evans, of boyband Try Star, hit him with a pretty harsh comment. The trip had been forced to change their song last-minute and so, they ended up performing No Diggity, the same song they had performed way back at their audition in Simon Cowell's Malibu home at the start of the competition. That decision left them open to criticism from the judges but it didn't stop there. Louis began by saying that performing a song they had already used wasn't on but he then went on to credit Levi Davis as the main vocalist and Thom and Ben Foden as mere "backing singers". You can see where this is going and while you might have heard what Louis said, did you listen to Thom's serious snap back?

THE SHADE!#XFactorCelebrity #XFactor pic.twitter.com/wPP9XlABjO

— The X Factor (@TheXFactor) November 9, 2019

After Dermot O'Leary gave the microphone to the lads to have a final word after judges comments, Thom let rip with:

"Louis, I just want to say with all due respect, you've been a backing singer to Simon Cowell for most of your life..."

He didn't hold back as you can see and of course, the audience loved the drama. Simon too was keen to show his appreciation for the burn and people watching at home took to social media to point out the comment. Poor Louis, you can see his point but you have to be prepared for those caustic put-downs when appearing on live TV every Saturday night...

Round of applause for Thom Evans embarrassing Louis Walsh, live on TV ??

— Amy (@ag30xx) November 9, 2019

Thom Evans to Louis Walsh: “fair enough but I’m not being funny, you’ve been Simon’s back up singer for most of your career” #XFactorCelebrity pic.twitter.com/4UtGKLRVnz

— lauuu (@lvo_xx) November 9, 2019

Thom Evans on Louis Walsh then. Oh my burn ? #theresbeenamurder #XFactorCelebrity

— Paul Barry (@Bazwaldo10) November 9, 2019

Thom Evans just totally destroyed Louis Walsh ?? #XFactorCelebrity #XFactor

— Ned (@neddthomas) November 9, 2019

OH MY GODDDDDDDD THOM EVANS JUST GIVE ME WHIP LASH COS THE SPEED OF THAT COMEBACK TO LOUIS WAS QUICK AND FAST HAHAHAHAH #XFactorCelebrity pic.twitter.com/f7yCNLNu1r

— lauuu (@lvo_xx) November 9, 2019