Who was the opera singer in the lost voice episode
I don’t know; unfortunately none of the voices or actors in LwL were credited (not sure why- possibly union reasons or the KaBlam staff/Nick staff wanted to keep the credits short). The only confirmed cast have turned up in either behind-the-scenes pics or confirmed by the actors themselves. PROBABLY a staff member on the show; I think besides Loopy, Larry, Mom, and most of the other kid characters, everyone else was played by a crew member on the series since the show was made on a pretty small budget.
It’s been twenty-four years and we still don’t even know who voiced Larry! (When I asked Stephen Holman a few years back, he said everyone kinda fell out of contact after the series ended- which was twenty years ago now- and he probably has them written down somewhere but can’t remember off the top of his head).