I've heard many urban legends over the years ... and believed a few of them, actually.
The "John Denver" one? Yes, but in this case, the artist was Andrea Boccelli, who couldn't sing because the demons were being put at bay by the presence of JW's amongst the audience. Supposedly an announcement was made, JW's called to backstage, their tickets were refunded and the concert went on. This was told to me by a CO, go figure.
Also heard the one about Annie Lennox being in a demon-worship cult.
Also heard that every artist signed to the Atlantis record label had to agree to sing/play under demonic infulences. This included folks like Brian Adams, etc. I know many JW's who threw away their records and stopped playing these songs in wedding receptions because of this urban myth.
Here are two of my favourites:
This one from South Africa: A couple was having marital problems. Someone told them that they should look for demonic influences within their household. They narrow it down to a painting of two horses that someone had offered them as a wedding gift. So the man goes to his backyard and attempts to destroy the paiting and oddly enough, he is unable to. So he decides to take it to a field and burn it. As he sets the painting on fire and prays to Jehovah, two horses rise from the painting and start running away across the field.
This one from unknown origin, but possibly from Africa too: A faithful JW woman had a terrible unbeliever husband who opposed her JW routines, beated and abused her. One day, out of the blue, he offers himself to take her to a meeting. Instead of taking her to a meeting, he takes her to the bushes, where he draws a gun and points it to her head and says he's going to terminate her. The woman is kneeling, eyes closed, and prays to Jehovah. Then she hears sounds as if a sword is being used, and the next thing she knows, her husband is slashed to slices by her side. When the forensic police examined the body, they tell her that the cuts were so perfect that no human hand could have done it.
Eden