It's not as if the billy is worked out on a scientific basis or anything, I imagine many people like me, they get to the end of the list, and remember they need a billy, and they don't know what to pick, and just have to pick one.
Often people will make it easy for me if, for example, they've nommed Billy Joel.
For the rest of my days, I will never, ever forget the disrespect shown to Status Quo....