HI KIM!!
How nice to have a Christmas service onboard. Tell your DH that he is the boss when it comes to planning the service. You can do whatever you think would make for a nice Christmas celebration. You could find some other pax who will be on that same ship and see who wants to attend. Try the RollCall section on Cruise Critic and the "Cruise Tracker" right here on Cruise Addicts. You can also post an inquiry on Cruise Addicts, Cruise Critics and Cruise Mates on the appropriate board...Celebrity??
HOPE THIS HELPS....AND...MERY CHRISTMAS!!
ROSS