Adagio Dazzle's singing voice will (obviously) be provided by Kazumi Evans, who does Rarity and Luna as well.
Did anyone figure that out already?

3550253
Yeah. As soon as Adagio started singing, I went, "Hey, that sounds like Rarity's singing. Must be Kazumi." I'm certainly not going to complain about hearing more of her voice, that's for sure.

3550476 Kazumi's voice is so lovely.

3550776 Yeah, I agree.

I play threadromancy!

5481093 I obey, master.