What's the name of that song?

La-de-da-de-dum,
La-de-da-de-dum,
What's the name of that song?

La-de-da-de-dum,
La-de-da-de-dum,
What's the name of that song?

It goes la-de-da-de-dum,
La-de-da-de-dum,
Something something birds.

La-de-da-de-dum,
La-de-da-dee,
I wish I remembered the words.

La-de-da-de-dum,
La-de-da-de-dum,
What's the name of that song?

La-de-da-de-dum,
La-de-da-de-dum,
I'd like to sing right along!

I've heard it said,
With words and music
A fellow can't go wrong.

So la-de-da-de-dum,
La-de-da-de-dum,
What's the name of that song?

La-de-da-de-dum,
La-de-da-de-dum,
What's the name of that song?

La-de-da-de-dum,
La-de-da-de-dum,
We need the name of that song!

It goes la-de-da-de-dum,
La-de-da-de-dum,
Something, something nice.

La-de-da-de-dum,
La-de-da-dee,
I think it repeats itself twice!

La-de-da-de-dum,
La-de-da-de-dum,
What's the name of that song?

La-de-da-de-dum,
La-de-da-dee,
I know the name of that song!

It's called--now wait,
I think I got it!
Oh, no--I must be wrong--

So la-de-da-de-dum,
La-de-da-de-dum,
What's the name of that song?

(Honkers) Honk-ee-honk-ee-honk, honk-ee-honk-ee-honk
(Oscar-annoyed) What's the name of that song?
(All) La-de-da-de-dum, La-de-da-de
(Oscar) They keep on singing that song

They go La-de-da-de-dum, La-de-da-de-dum
La-de-da-de-dum,
La-de-da-de-dum, La-de-da-de-dum,
They start it all over again.

La-de-da-de-dum, La-de-da-de-dum
(Gordon) Something shining above.
(two-headed monsters sing some unintelligible words that end with something that rhymes with "above")
We can't help singing La-de-da-de-dum
Loud and clear and strong.

But La-de-da-de-dum, La-de-da-de-dum
La-de-da-de-dum, La-de-da-de-dum
La-de-da-de-dum, Laaaaaaaaaaaa!

What IS the name of that song?