Mr.Playstation on 28 June 2015
I think it all depends on how relative you remain. You can't just leave music for a while and then return expecting to sell as many albums as before, which many old artists seem to do. Look at Jennifer Lopez and Shakira, both have been in the music buisness since the 90's, yet many do not realize this since they have constantly never taken long breaks from music and have always strived to be current and produce big hits. It's how it goes 
. Madonna ( Love her new single BTW. ) is practically the same as these two artists, and her new album rebel heart has sold pretty well so I don't really see how she's an example of how old artists have trouble selling their songs.
