Liberty X are following in the footsteps of Girls Aloud and Shane Richie in performing the official song for Children In Need.
Kelli, Michelle, Jessica, Tony and Kevin are recording their own version of disco classic A Night To Remember.
They will be singing on BBC One for the Children In Need star-studded big fundraiser on 18 November.
Jessica said the charity was really important because "it helps children and young people who really need it".
Kevin added: "We don't have to be the only ones raising money by singing. Families anywhere can do their own concert or maybe a sponsored karaoke to raise money."
A Night To Remember comes out on 21 November.