On the Fifth Day of iTunes...

"Up on the House Top" by Gene Autry. My dad still has the original 1957 LP, Rudolph the Red-Nosed Reindeer, which included this song. The album has the more famous title track, of course, but this was one of it's lesser-known favorites. Autry was known as "America's Favorite Singing Cowboy," so most of the songs on the record have a western swing feel. The album was recently released on CD.