Lyrics:

I saw Mommy kissin' Santa Claus
underneath the mistletoe last night.
She didn't see me creep
down the stairs to have a peep;
She thought that I was tucked up
in my bedroom fast asleep.

Then, I saw Mommy tickle Santa Claus
underneath his beard so snowy white;
Oh, what a laugh it would have been
If Daddy had only seen
Mommy kissin' Santa Claus last night.

We know a secret, we got a little secret,
yeah, yeah, nah nah nah!

< instrumental break >

Then, I saw Mommy tickle Santa Claus
underneath his beard so snowy white;
Oh, what a laugh it would have been
If Daddy had only seen
Mommy kissin' Santa Claus last night.

Words and Music by
Johnny Marks , 1949