The second and final series of the New Zealand television reality music competition The X Factor premiered on TV3 in February 2015. Pre-auditions began in October 2014. As well as again being open to singers aged 14 and over, the series was also open to bands, which had to contain no more than five members and have at least two singers. The contestants were split into the show's four traditional categories: Boys, Girls, Over 25s and Groups.