Apu's haircuts: George Clooney, jheri curl, flat top with name shaved in side, Coolio and Jennifer Aniston.
In the scene where Apu's mother asks Bart if the wedding fire is sacred yet, Bart is tearing pages out of a book titled "Hymns". It was originally planned to be a bible, but after it was animated, the staff decided that it would be too disrespectful and made the change.
An Indian version of The Carpenters' song "(They Long to Be) Close to You" (the same song Homer and Marge danced to) is sung at the wedding. An Indian vocal group was hired to sing while Alf Clausen wrote the instrumental part.
Mike Scully said that Homer writing "Where are the sticky buns" on a sheet of paper after Apu is asking for advice is one of his favorite jokes.