"You're Only As Old As You Think You Are" is a song sung by Papa Smurf (and then all the other Smurfs) when he was dating Flowerbell the woodnymph in the cartoon show episode "Papa's Wedding Day". The song mostly goes like this:
- You're only as old as you think you are, if you think at all.
- If you act as young as you think you are, you'll feel ten feet tall.
On a rowboat date with Flowerbell, Papa Smurf adds another verse:
- When the sky is blue and I'm with you, I hear nature's...
- (Song is briefly interrupted by the sound of the Smurf River Bridge collapsing.)
- If you act as young as you think you are, you'll feel ten feet tall.