I've heard a lot of songs where the musicians tried to do secular introductions to...
You know that song from Prince Diamonds and Pearls? I've heard a song doing that but the worst is a song by D'Angelo (remember him?) called $#!T, D*M# MOTHER @#*$#& and they did that beat thinking that people would hear that beat (which is tight and funky) and not think back to that cussing in that song...
I even heard a local singer try to take a song called "I'm in Love with a Stripper" and turn it into I'm in Love with my Jesus...

As soon as we do stuff like that, it makes us look like hypocrites because
1. We say to those young people in our congregations that it's ok to be double-minded (unstable in all of our ways) and even though you're listening to music that doesn't edify the body... you're not alone...
2. We show we are truly ignorant to what spiritual things happen when music comes forth... no matter what the source...
MrSparrow