It was a first on NBC’s smash competition series The Voice. Four celebrity coaches sat with their backs turned to hopefuls, listening to and hand-picking voices they thought could take their teams to the end of the season. But when Nashville’s husband and wife duo, Josh and Nicole Johnson, took the stage the judges were shocked to hear two voices expertly harmonizing their selected song. It was Blake Shelton who added the duo, known as Elenowen, to his inaugural team in the show’s first season. Since then, Elenowen have released their debut full length album Pulling Back the Veil, toured the country, signed two record deals, had a baby and then considered trading their perfectly matched…