The singing competition is back this Christmas for a one-off celebrity special as some familiar faces do their best to impress The 100.
The line-up is led by none other than The Only Way Is Essex favourite Gemma Collins.
She'll be hoping her vocals dazzle as much as her skating skills, ahead of her upcoming appearance on Dancing On Ice.
Gemma is up against ex-islander Amber, telly hosts Chris Kamara and Alison Hammond and former EastEnder Laurie Brett.
Also taking on the challenge are comedians Omid Djalili and Sara Pascoe and actor Tyger Drew-Honey.
Although they're not known for their singing abilities, the celebs will have to put on show-stopping performances to win over the 100 judges.
Led by Spice Girls member Geri Horner, the panel features a mix of singers from every corner of the music industry.
As usual, members of The 100 will stand up and join in with their favourite performances. The more judges a celeb wins over, the higher they will score.
Funnyman Rob Beckett is also back as the show's presenter.
Executive producer James Fox commented: "They say that everyone’s got one great performance in them.
"We can’t wait to find out how true that is as a whole host of famous faces take on The 100.
"It’s going to be a feel-good, laugh-out-loud show that will get everybody joining in."
All Together Now Celebrities will air on BBC One over the festive period, although bosses have yet to confirm an exact airdate.
The special precedes the second full series of All Together Now, which is due to begin in early 2019.