I doubt we will ever hear Anne Murray singing a song entitled "I Eat Zombie Brains."
Nor do I think that we will hear Billy Idol covering the Partridge Family hit "I Think I Love You."
And Hank Williams Jr. will probably never sing a "We Love Barack Obama" ditty.
Notice that I qualified all of the statements above. After all, it seemed extremely unlikely that Pat Boone would cover Ozzy, Deep Purple, Van Halen, and Led Zeppelin - until he did it. Although I could find no mention of "In a Metal Mood" at Boone's official website, which lists no releases between 1995 and 2002.