'He [David Usher] and his new band - which includes two members of Moist - play Red's Saturday night. You may have heard Black Black Heart on the radio. It's a great song - or is it? If you love it because of the opera sample within - Dome Epais le Jasmin from Lakme by Leo Delbes, the famous 'Flower Duet' - you may not be alone. The haunting, 100-year-old aria forms the very heart of Black Black. Usher has done some interesting things with the song, but without the opera sample it would be a Moist B-side in more ways than one.'
It may be what you're looking for. Here's the link: http://www.ualberta.ca/~blee/articles/popera.html