I've been doing a lyric for Thanksgiving using a line or two I believe I've heard before, but can't find in the dt. It's more or less like Making Whoopee, but the turnaround line instead is/was
The greatest thing
under the sun
is having fun.

Anyone else think they've heard something like that? It might've been The sweetest thing. It seems to me I got it somewhere, and I'd like to find it.

Mine is for kids. Closest it gets to Making Whoopee is

We all agree, with no dissention
thankfully, it's our intention
to give thanks for so many good things we love
even some that we won't mention
but the greatest thing
under the sun
is having fun.

and then becomes my new additive rhyming game with kids, with the usual orange-rhyme business and my orange story

we're thankful for apples, and thankful for oranges
we're thanful for windows and doors
we're thankful for the door-hinges, etc.

thankful for spoons, thankful for forks too
thankful for sparkling grape juice in bottles
that don't need a corkscrew

anyway. I think there's a song like that, somewhere. Help?