My son's was "Holly Jolly Christmas," which, because they have been singing it in music class, has become one of his favorites. But apparently his music teacher didn't quite get all of the lyrics across to them. His version includes the line:
Oh, ho, the mistletoe
Hung where you can see
Somebody waits for you.
"Yes sir!" once for me.
And my daughter's was "It's the Most Wonderful Time of the Year." She was humming it to herself, when she suddenly asked me "Mommy, what's a love bug?" Wanting to put it in the proper context, I asked what she was talking about. She responded with the line:
There'll be much mistletoeing
And hearts will be glowing
When lovebugs are near.
Yes, it's definitely the most wonderful time of the year. :)