Great thread.
Sting sang a song in Irish about 8 years ago with The Chieftains. Mo Ghile Mear, I think and I'm still in therapy. I wish that one of those trees that he hugs would fall right on top of him.
Steve Earle, one of my great heroes has written more than his fair share of crap.

And now I'm going to stick my neck out........... Ewan MacColl wrote many fine songs and murdered just about every single one of them. Most of his arrangements and his singing wouldn't hold up even at an amateurs evening.
Man I've wanted to get that bit about MacColl down on paper for years.