Spanish tenor Placido Domingo has confirmed he'll be the latest celebrity making a guest appearance on an upcoming episode of animated TV series The Simpsons. In the episode, called The Homer Of Seville, the opera great takes singing lessons from Homer Simpson. Domingo's spokeswoman Nancy Seltzer says, "He's had such a wonderful time doing it... He had a ball." The episode is scheduled to air in the U.S. on 30 September (07).