Reverend Mother: Girl groups? Boogie-Woogie on the piano? What were you thinking?
Dolores: I was thinking more like Vegas, you know? Get some butts in the seats.
When Eddie arrives at the casino near the end of the film, he opens the car door and in the reflection you can see the filming crew.
In the last scene, when the choir sings at the church, the Blues Brothers can be seen on the background in exactly the same position as the church number in the Blues Brothers film.