Johnny has a secret, and a secret he must shareHe wants to tell somebody, so he tells his teddy bearCome over here, I've got something to tell youI saw mommy kissing Santa ClausUnderneath the mistletoe last nightShe didn't see me creep down the stairs to have a peeShe thought that I was tucked up in my bedroom fast asleepThen I saw mommy tickle Santa ClausUnderneath his beard so snowy whiteWhat a laugh it would have beenIf daddy had only seenMommy kissing Santa Claus last nightSo now mommy's gonna kiss Santa ClausUnderneath his beard so snowy whiteWhat a laugh it would have beenIf daddy had only seen. . .I said I saw mommy kiss Santa ClausWhile underneath the mistletoe last nightShe didn't see me creepDown the stairs to have a peeAnd she thought that I was tucked upAnd mom fed me fast asleepThen I saw mommy tickle Santa ClausUnderneath his beard so snowy whiteWhat a laugh it would have beenIf daddy had only seenMommy kissin' Santa Claus last nightIt shocked meYou know it rocked meSeen mommy kissin' Santa Claus last nightYeah, yeah, yeah, what I did