I saw daddy kissing Santa Claus
Underneath the mistletoe
Last night
He didn't see me creep
Down the stairs to have a peek
[Mike screams "Oh GOD!"]
He thought I was up in the bedroom fast asleep
Then, I saw mommy kissing Santa Claus
Underneath the Christmas tree last night
There must be some mistake
Was I really awake?
I move in closer, but better look away
[Mike and Billie make barfing noises] [ Lyrics from: http://www.lyricsmode.com/lyrics/g/green_day/i_saw_my_parents_kissing_santa_claws.html ]