One Direction are: Liam Payne, 18, Harry Styles, 18, Louis Tomlinson, 20, Niall Horan, 18 and Zayn Malik, 19. The band were formed in the The X Factor's Bootcamp stage, and left the competition in its final round. Since then they've played to sold out arenas as they toured the country with The Official X Factor tour, signed a record deal with Syco, recorded their debut album and released two number 1 bestselling books.

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