Who was the "The X Factor" runner up to the winner whose single, "Impossible", has gone on to sell over 1.4 million copies in the UK?
Jahméne: Jahméne Aaron Douglas (born 26 February 1991) is a British soul/gospel singer who records under the mononym Jahméne. Jahméne:  He was the runner-up to James Arthur on the ninth series of "The X Factor" in 2012. James Arthur:  His debut single, "Impossible", was released by Syco Music after the final and debuted at number one on the UK Singles Chart in its first week of release. James Arthur:  Since then, it has gone on to sell over 1.4 million copies in the UK, making it the most successful winner's single in the show's history and has sold over 2.5 million copies worldwide.
Jahméne Aaron Douglas