Frontman will appear on three episodes of reality show assisting all four coaches
The group's iTunes Festival show sees them play tracks from their forthcoming sixth album 'Ghost Stories'
The band's sixth LP will be released in May
Band reveal video for new song
Band will appear alongside Imagine Dragons and London Grammar at iTunes Festival event
Chas 'n' Dave, Conor Maynard and Becky Hill also appeared at the Ring O' Bells in Compton Martin
The band apparently forked out £3 for each 'Xyloband' given to punters
Bands nominated alongside Taylor Swift, Justin Timberlake and Idina Menzel in Best Original Song category
Coldplay present Under 1 Roof will take place at the Eventim Apollo in Hammersmith, London on December 19
Singer performed ''Ain't No Love (Heart Of The City) with the rapper