Thanks for starting this game back up guys! As I've mentioned, I've played games similar to this on other forums and we have never worried about songs being repeated much. I did want to re-post the "rules" for the game again... I think we're so used to the ABC games that this new round came naturally to you like that, which is fine, but I think the way I began it is more fun:
One person posts a song such as:
I'll Be Home For Christmas
The next person has to name another Christmas song that uses at least ONE of the words in the previous title, bolding the word they choose:
O Christmas Tree
If you know the artist and would like to include it, feel free to.