Just since it is done traditionally, you are able to prepare printed Christmas lyrics sheets and hand them over to you and your guests. Then it is possible to all go close to the piano to sing the songs 1 by 1. That is, of course, when you have a piano. If not, then you'll be able to take action in the handiest and modern way, through your computer and PowerPoint. All you have to do is to download Christmas music online, in particular those karaoke audio files, and play it. With great stereo sounds and a handful of microphones, you and your invited guests will surely enjoy Christmas Eve.