Ha! This morning’s ‘official’ message reads: *we are now happy to announce that kjartan (keyboards) will be writing and arranging strings for 4 songs on coldplay’s as-yet-untitled follow up album to 2008′s acclaimed ‘viva la vida’. kjartan has already completed most of the arrangements, which are set to be recorded in late spring. in addition to kjartan’s contribution, jonsi will join chris martin on vocals on one of the album’s songs. we were fortunate enough to be allowed to visit coldplay’s rehearsal space while jonsi and chris were rehearsing their collaboration, which promises to be nothing short of amazing. we filmed a short video from the session, which is viewable here.