The Concert for Bangladesh (1972): 31:50 - 32:15

Here George Harrison is singing words to his beloved #1 hit song, My Sweet Lord, which are normally sung in the background. My theory is that the background singers, who didn't have much time to rehearse, and who were completely unfamiliar with Sanskrit, were not able to learn these relatively complex lyrics in time for the show.

http://www.imdb.com/title/tt0158560/