The show's host Keith Lemon dressed up for the occasion alongside team captain Gino D'Acampo and guests Jimmy Carr and Jessie J - but can you guess who they all dressed as? It certainly took us a while to figure it out!
Sporting an all-red ensemble and a curly black wig, Keith dressed up as Michael Jackson from 'Thriller', and while Jimmy Carr makes a very realistic skinless corpse, we're not sure what Jessie J or Gino have come as!
Jessie posted the hilarious snap on Instagram earlier today, saying: "The MOST I've laughed on a TV show ever! Keith thank you so much for inviting me on!"
Revealing that it didn't all go smoothly, Jessie explained that her skirt ripped live on air, saying: "I was wearing a latex skirt but it ripped DURING the show, you'll have to tune in tonight to see how and why!
"Jimmy and Gino thank you for being so vulgar and hilarious!"
And team captain Fearne Cotton made sure to get involved with the fancy dress theme too.
Posting this snap of herself as a creepy corpse, she said: "A fun, bonkers and slightly out of control Halloween celebrity juice tonight."
Does Fearne win the award for most frightening transformation? We think so!
Earlier in the day, 'It's My Party' singer Jessie posted a super cute throwback photo of herself dressed as a spider. We love it!
Catch the Celebrity Juice Halloween special tonight at 10pm on ITV2.
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