All evening, I’ve been trying

All evening, I’ve been trying to find reference to a Tex Avery cartoon that featured the "Figaro, Figaro, Figaro" song from Puccini’s Barber of Seville. And I wasn’t thinking of the Bugs Bunny cartoon "Rabbit of Seville" or even the Woody Woodpecker classic that featured that song. Nope, I knew it was definitely an MGM cartoon directed by Tex Avery.
It was, of course, Magical Maestro (details can be found here), which featured a "leet-ul maaag-ic wand!", and is, almost without doubt, one of the funniest cartoons ever made. It was also one of the last that Tex Avery made for MGM. If ever you get a chance to see it uncut (a scene where Poochini is transmogrified into a Chinaman and then a black man is now often cut, even though there is absolutely nothing racist or offensive about it), be sure to empty your bladder before you watch it.
For more on Tex Avery, get this book, which happens to be in my wishlist [hint].