"If you take Disco Queen as an example, you can see it in two different ways. Just like an old Disco vinyl record with funny music or it can be something a lot more serious if you read its lyrics. And of course Disco is a very sexy beat that we all know so…you just have to feel the concept of the music and you'll understand. And of course it's really funny to play this song."
Johan Hallgren gave a bit of a cryptic answer to the song's meaning in this interview http://www.metalstorm.net/pub/interview.php?interview_id=405
"If you take Disco Queen as an example, you can see it in two different ways. Just like an old Disco vinyl record with funny music or it can be something a lot more serious if you read its lyrics. And of course Disco is a very sexy beat that we all know so…you just have to feel the concept of the music and you'll understand. And of course it's really funny to play this song."