She was lookin' kinda dumb with her
finger and her thumb in the shape of
an "elf" on her forehead.

The story:

Actually, my daughter, Shannon, is
the one who had the words wrong.
She was 14 when I heard her sing
them, and I busted out laughing! I'm
the old fogie but at least I knew the
words! To this day, we still try to get
our fingers and thumbs into the
shape of an elf!