I had reservations about the song being a single at first. I was always worried. When we put out "Killer Queen" everybody thought it was the most commercial. I was worried that people would put us in a category where they thought we were doing something light. Sheer Heart Attack was, in my mind, quite heavy and dirty and "Killer Queen" was the lightest and cleanest track and I was worried about putting it out. But when I heard it on the radio I thought, "It's a well-made record and I'm proud of it so it doesn't really matter." Plus it was a hit so fuck it. A hit is a hit is a hit.