Housemates were woken up by Christmas songs being played into the bedroom, before Big Brother revealed the house had been transformed into Santa's Grotto. We're talking a huge Christmas tree, presents, tinsel, fairy lights, a log fire, reindeers and SANTA himself!
He left a sack of gifts under the tree and told the housemates: "These are for you. Goodbye boys and girls. Ho ho ho."
Oh, and did we mention that the garden had turned into the North Pole too?! Yup, it was completely covered in snow and complete with Santa's sleigh and snowballs for a good ol' snowball fight.
"I literally felt like a little kid waking up on Christmas morning for the first time," Frankie said. "Oh my god. This is so exciting. I'm so happy, it gives me such a sense of joy."
Marnie, meanwhile, didn't seem as keen. She told Big Brother: "I'm not really a Christmas person. I don't really enjoy it that much if I'm honest, I'm not a scrooge. I do like Christmas Day, but everything else is overrated."
The house was then split into two teams to battle it out in the latest festive-themed shopping task: The Elves (Renee Graziano, Aubrey O'Day, Marnie Simpson and Frankie) and The Reindeers (Stephen Bear, Ricky Norwood, Katie Waissel and Sam Fox).
Each team then had to complete a dance every time a Christmas tune was played into the house. For the elves, they had to head to their workshop and perform a short dance until they heard 'Ho ho ho.' The reindeers, meanwhile, had to run to Santa's Sleigh when they heard Jingle Bells and prance around until they heard the same.
If they didn't, they would incur a fail.
And things got pretty competitive. Not only did Bear try and put the elves off when they were trying to come up with their signature dance, but he also grabbed Marnie to try and stop her reaching the workshop on one of the elves' turns - which led to him clashing with Renee.
He told his team: "If you think I'm going to let them beat me.. it's you lot who need get your game on."
The housemates then had to compete in a Christmas Pud rodeo. How brilliant is that?! Before then taking part in a Big Brother's not-so-boring board game. Depending on which square they landed on, housemates either had to hear tweets sent in by viewers and guess who they were about, or take part in a festive-themed challenge.
While Ricky refused to drink his cup of century eggnog (tbh, we can't say we blame him!), Sam had to try and edge a gingerbread man down from her forehead and into her mouth, without using her hands.
The elves won the board game challenge, along with the Christmas Pud rodeo, meaning they beat the reindeers and won the task overall. Their prize was a nominations twist ahead of the CBB final later this week.
As a reward the elves were given the power to nominate TWO of their fellow housemates, while the reindeers are only allowed to choose ONE housemate to put up for eviction.
So, how do you round up a day filled with Christmas? By blasting out Mariah Carey's 'All I Want For Christmas', of course!
Follow us on Twitter @RevealMag for all your celeb, fashion and beauty news!
Fancy winning some GREAT prizes? Check out Reveal Competitions here!