We'll Meet Again by Vera Lynn is the song you hear as you leave The Twilight Zone Tower of Terror™ at Disney's Hollywood Studios™.

It's also featured in the animated short The Lady And The Reaper (must watch material).

Vera (the singer) is featured prominently in The Wall by Pink Floyd.

Does anybody here remember Vera Lynn?
Remember how she said that
We would meet again
Some sunny day?
Vera! Vera!
What has become of you?
Does anybody else here
Feel the way I do?

The song is also cleverly included in the track MC: Atmos (1:14) on Is There Anybody Out There? The Wall Live 1980-81 (Disc 1).