Pop music is aimed at teenagers and looks up to pop stars, but is not liked by many boys or people over 18. Classical music is for older generations but is limited in sales as not many people under 30 like it. Rock has been produced for a long time and is liked by most people, but is only aimed at boys over 18. R&B aims at both genders and uses bold colors to stand out, but does not have as much demand or popularity as genres like pop.