. >> jean luca, pierro, and ignacio. >> we love having you guys here.pbs special. that was fantastic. >> my, what a beautiful song. >> singing christmas songs you always make things your own. how did you go about doing it for these songs? >> we love christmas. christmas is the only one time of the year we can stay with family. when we sing the christmas song "i'll be home for christmas" we feel home. >>. ♪ we'll be home for christmas >> you know who wrote that? >> mel tomorrow torme. >> you are a shadow of your former self. we are proud of you. >> he is the same. >> he didn't change me. i am the same. >> what are you singing for us? "o holy night". >> here they are, everybody. il volo. ♪ off holy night ♪ the stars are brightly shining ♪ ♪ it is the night of the dear savior's birth ♪ ♪ long lay the world in sin and error pining ♪ ♪ until he appears and the soul felt its worth ♪ ♪ a thrill of hope the weary world rejoices ♪ ♪ for yonder breaks a new and glorious morn ♪ ♪ fall on your knees ♪ oh hear the angel voices ♪ oh night divine ♪ oh night when chris