Fifth Harmony on UK 'X Factor' performance: 'It's bloody insane!'

Girl group Fifth Harmony will be heading to the UK in early December for a special performance of their brand new single 'Sledgehammer' on 'The X Factor'.

The beauties will take the stage on December 7 to treat fans, audience members and viewers alike to a live rendition of the song, which was co-written by 'All About That Bass' hitmaker Meghan Trainor.

Songstress Dinah Jane took to her official Twitter page shortly after the confirmation of the exciting news and revealed that she can't wait for the performance:

"YAAAAYYY Finally get to announce that we'll be out in the UK Dec7!!! BLOODY INSANE?! #5HonXFUK. I hope *bloody* isn't a bad word ..I just wanted to say it cs it sounded cool ..and I wanted to feel like I'm from the UK :/ .. Wehhh lol."

Member Ally Brooke Hernandez also shared a tweet about the forthcoming appearance, adding: "My loves, I couldn't be more ecstatic that we will be going to the UK in December to perform on 'The X Factor'. So crazy y'all. Can't wait to finally see the UK and our Harmonizers over there."

Watch a new interview with the girls here: