What is the word

[Happy Holidays]

that describes the spoken word sung; for example a film were all the words are sung and no words are spoken.

I've been wracking my brains (ok not that good these days) but it just won't come to mind.

 

[silly sausage]

Libretto?

 

[Shrimpy]

Musical?

 

[Happy Holidays]

Libretto?

You just don't know how much this has been bugging me my sister said musical at first, then operetta but I just knew they weren't what I was looking for.

thank you