Best known for their high-energy performances, power harmonies and infectious vocal arrangements, these high achievers have made it their mission to modernise and stir up the world of a cappella music. As seen on: The X Factor, The MOBO Awards, Britain's Got Talent, Radio One's Big Weekender and SKY1'S new music show 'Sing: Ultimate A Cappella'.
Price from £3,799 + travel
