Stephen Colbert’s “Another Christmas Song” is — as a song by Stephen Colbert called “Another Christmas Song” would suggest — a dose of heavy sarcasm administered with a jolly wink. "Make it a part of your holiday canon," Colbert belts in his best Broadway voice over a perky (yet purposefully generic) big-band sound. "Make it a part of my retirement plannin'." The cornily subversive dad in you will love it and probably the forthcoming A Very Colbert Christmas, too.