A song without a reason, a song without a rhyme

This is a song without a reason a song without a rhyme
A song you sing because you feel like singing do do do do
Well you don't need rhyme or reason to sing a happy song
do do do do do do do do do do do do do do do do do do do

This is a song without a reason a song without a rhyme
A song that you can sing or hum or whistle do do do do
Well you don't need rhyme or reason to sing a happy song
do do do do do do do do do do do do do do do do do do do

You can sing it high or low
You can sing it fast or slow
It doesn't matter . . . .
do do do do do do do do do do

This is a song without a reason a song without a rhyme
A song that doesn't even have an ending do do do do
La la la la la la la (etc.)