What a coinkidink! Just as I’m going through the classics (for example, right now: American Woman by the very wonderful The Guess Who), I stumble across these Lollipops on “Flip Flop Flyin'”. They’re cartoon pictures of famous singers / rock groups, with round shapes and without faces. You should totally check them out. It’s fun trying to guess who it is, then if you pass the mouse cursor of the image the name appears.
My favorite is Guns’N’Roses, of course.