from Maskerade (Terry Pratchett)

'Well, basically there are two sorts of opera,' said Nanny, who also had the true witch's ability to be confidently expert on the basis of no experience whatsoever. 'There's your heavy opera, where basically people sing foreign and it goes like "Oh oh oh, I am dyin', oh, I am dyin', oh, oh, oh, that's what I am doin'", and there's your light opera, where they sing in foreign and it basically goes "Beer! Beer! Beer! Beer! I like to drink lots of beer!", although sometimes they drink champagne instead. That's basically all of opera, reely.'