There are so many songs that I've misheard lyrics to, often leading me to misinterpret the meaning, or making me think that the lyrics don't make any sense. Mostly, it's certain words that I hear that I think are something completely different from what they actually are.
As an example, in Three Dog Night's Joy To The World, I thought it went "Joy to the fishes in the deeper sea!" (It's actually "deep blue sea"). I'm not kidding on this one either.
Even today, I still will mishear lyrics, particularly on songs that I've never heard before.