In reply to Bam.

If u are a current pop star and your only purpose is to get as many hit singles in singles charts as possible then it is not as difficult or impacting as it once was. If Rihanna´s album sales were remarkable then her "achievement" would mean something. She obviously is out of place on that list. Others her age decided they also wanted to grow and change direction and do real albums/eras. Not just let your team of producers do an album every year for you with the right singles.