Adam Levine and Kelsea Ballerini join season 27 of 'The Voice'
Levine, Ballerini, Michael Bublé and John Legend will be coaches for the show's 27th season premiering next spring, 'Variety' reports. This will be Ballerini's first time as a head coach, although she served as a battle adviser on season 16 and filled in as a coach on season 20.