Dolly Parton has supplied some Christmas magic for fans at her namesake, Tennessee theme park, Dollywood. The singer is appearing daily in a new musical version of "A Christmas Carol" - via hologram. The production uses 3D holographic technology to make it seem as if Parton is actually on stage, performing next to live actors. The Grammy-winning singer plays the Ghost of Christmas Past - and even sings a song, one of eight new numbers she wrote for the show.