Tinie Tempah and Katy B will perform their hit 'Turn The Music Louder' at Capital's Jingle Bell Ball on Saturday December 5.
The 27-year-old rapper and 26-year-old singer will take to the stage
at The O2 arena in London to duet on the collaboration, which they recorded with house producer KDA.
Katy and Tinie join an already star-studded line-up that includes Coldplay, Ariana Grande, Jess Glynne, David Guetta, Nathan Sykes, Jason Derulo and Years & Years.
The performers confirmed for Sunday December 6 include Justin Bieber, Calvin Harris, Ellie Goulding, Little Mix, Nick Jonas, Sigma and Charlie Puth.
Bieber has promised he'll be ready to perform songs from his new LP 'Purpose' when he takes to the stage in the UK capital.
He previously said: "It's been a couple of years, I enjoy any performance for my fans. I just love the energy, when they come to watch me perform their whole mentality and their whole spirit is coming just ready to have an awesome time. It's going to be high-energy, a lot of singing and a lot of dancing. I think I'll be singing some of my new stuff by then, yeah."