Thanksgiving Cheer

I was sitting with family when my sister announced that it didn't feel much like Thanksgiving. My mom asked her how it would feel more Thanksgiving-y. She replied "Singing some Thanksgiving songs." My mom and I looked at each other. Thanksgiving songs? Personally I just think my sister is crazy, but does anyone actually know of any "Thanksgiving" songs? Later at dinner we had the radio on and some Christmas songs were playing but my sister was changing the words to make them more about Thanksgiving. "And a turkey in a pear tree....."