Movies that featured a famous person singing that you wished they would have had somebody dub his/her voice?

I know that last year, we had this, where normaly if an actor or actresses can't sing, they would normmaly would get somebody in that normally does sing, in to dub his/her voice, and we have seen this done with plenty of movies, animated and not animated. But last year, that in less you have been living in a cave, we had Pierce Brosnan singing in the movie version of the stage play of Mamma Mia! But can you think of any more movies, in which had a famous actor or actresses like Pierce Brosnan singing, and their voice was so bad, that you wished the filmmakers would have done the smart thing, and hired somebody to dub the voice instead?