Offertory: Hey Big Spender.
Good Friday: Yesterday/Beatles. They wouldn't have to change any lyrics except for "why SHE had to go"
:)
Don't forget Rick Warren's version of "Purple Haze".
I wonder if you could take "Eye of the Tiger", change the lyrics to reflect "Heart of the Christian", and have a pretty snappy church-tune?
That'll be sure to bring 'em in!