Trent Nelson | The Salt Lake Tribune The Mormon Tabernacle Choir sings during a dress rehearsal of their Christmas concert with special guests Deborah Voigt and John Rhys-Davies Thursday December 12, 2013 at the LDS Conference Center in Salt Lake City.Trent Nelson | The Salt Lake Tribune The Mormon Tabernacle Choir sings during a dress rehearsal of their Christmas concert with special guests Deborah Voigt and John Rhys-Davies Thursday December 12, 2013 at the LDS Conference Center in Salt Lake City.Trent Nelson | The Salt Lake Tribune picture taking or recording of any kind is not allowed. during a dress rehearsal of the Mormon Tabernacle Choir's Christmas concert with special guests Deborah Voigt and John Rhys-Davies Thursday December 12, 2013 at the LDS Conference Center in Salt Lake City.Trent Nelson | The Salt Lake Tribune Dancers perform during a dress rehearsal of the Mormon Tabernacle Choir's Christmas concert with special guests Deborah Voigt and John Rhys-Davies Thursday December 12, 2013 at the LDS Conference Center in Salt Lake City.Trent Nelson | The Salt Lake Tribune Dickens characters prepare to perform during a dress rehearsal of the Mormon Tabernacle Choir's Christmas concert with special guests Deborah Voigt and John Rhys-Davies Thursday December 12, 2013 at the LDS Conference Center in Salt Lake City.