I am surprised that the thread got this far without anyone mentioning the most obvious answer. Ghost The Musical. There are several ghosts that sing in that show.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle
And we can't forget Smash, when Katherine McPhee sings that show stopping song at the end, because no one would clap for a musical where Marilyn Monroe just dies at the end. Absurd!
I don't count Teen Angel in Grease and Clarence in It's a Wonderful Life as "ghosts". Angels and ghosts are two very different entities.
"All our dreams can come true -- if we have the courage to pursue them." -- Walt Disney
We must have different Gods. My God said "do to others what you would have them do to you". Your God seems to have said "My Way or the Highway".
*Edit: Well they are cursed paintings, so I'm not sure if they are dead or just cursed.
"TheatreDiva90016 - another good reason to frequent these boards less."<<>>
“I hesitate to give this line of discussion the validation it so desperately craves by perpetuating it, but the light from logic is getting further and further away with your every successive post.” <<>>
-whatever2
Some people say: NO. The Phantom is known as "Erik," people. He ain't NO ghost.
Scary thing is, they really mean it.
Some people think that in the finale of Les Mis, a bunch of ghosts appear in Valjean's room to sing randomly "buh-bye!" Yeah, the staging is meant to be taken literally and it isn't a scene typical of the kinds of places musical theatre can take us and the messages it can relay to us in unique ways. Nope. It literally is Fantine, Eponine, and random ghosts appearing in his room to sing "Goodbye!"
Funny.
Recreation of original John Cameron orchestration to "On My Own" by yours truly. Click player below to hear.
"I don't consider the characters in Follies or in Grey Gardens to be ghosts. I consider them to be shadows of the past, for want of a better term. I consider a ghost to be the spirit of a deceased person which is, for some reason, stuck in this world."
That was exactly my reason for putting it in the questionable column. The characters have to be dead to be ghosts. But, these threads always lead to gray areas, so I took the lead and started to define what I thought were those areas.
Emily in "Lavender Girl" - one of the mini-musicals in "3hree".
There have been musical versions of "The Canterbury Ghost" and "The Legend of Sleepy Hollow". In the latter it depends on whether the horseman is depicted as a ghost or as Brom Bones in disguise. I saw one youth theatre version where the opening prologue was sung by a chorus of Sleepy Hollow ghosts.
There is also the stage version of "Spoon River Anthology" which does have a few optional songs.
"You pile up enough tomorrows, and you'll find you are left with nothing but a lot of empty yesterdays. I don't know about you, but I'd like to make today worth remembering." --Harold Hill from The Music Man
Point noted. I missed CAROUSEL on the first page. And the Courier in 1776 is no ghost. Significantly, while the ghosts of the mother and grandmother "speak" in ALLEGRO, they don't sing. And what of the disembodied villagers of BRIGADOON? Ghosts- or just asleep?