Dennis: well boys and girls, it's christmas time again so you better watch out you better not cry better not pout im telling you why santa clause is coming to town he's making a list and checking it twice gonna find out who's naughty or nice santa clause is coming to town he sees you when you're sleeping he knows when you're awake he knows if you've been bad or good so be good for goodness sake oh, you better watch out you better not cry better not pout im telling you why santa clause is coming to town (instrumental) (now listen) he sees you when you're sleeping (he sees you when you're sleeping) oh yeah, and he knows when you're awake (and he knows when you're awake) he knows if you've been bad or good so be good for goodness sake oh, so you better watch out you better not cry better not pout im telling you why santa clause is coming to town with little tin horns and little toy drums rootie-toot-toot and rum-pa-tum-tum santa clause is coming to town oh (instumental)
https://primanota.net/temptations/santa-claus-is-coming-to-town-lyrics.htm