Have your kids ever sang the wrong lyrics to a Christmas song?

we went to a Christmas program today, one of my 4 year old triplets, said they wanted to learn the song about Harold the angel....(HARK THE HEARLD ANGELS SINGING)...he kept asking why no one ever told him about Harold the angel...it was so funny and cute, that my husband made up this great story about Harold the angel at CHristmas....Have your kids ever sang the wrong lyrics to a Christmas song?