I think we are just collectively getting older. So the newer artist don't appeal to us like our generation of faves did.
The glory days of Beyonce, Justin, Britney, Gaga, Pink, Jlo, etc are coming to an end. They are getting to be older artist and dont perform every year like they used too. The newer generation like Selena, Fifth Harmony, The multiple new rappers etc are what is hot to kids 20 and under lol.
To be honest with social media and all these flash in the pan artist they don't make celebrities like they used too
I know Rihanna has new material coming though so Maybe her, I'd love to see Janet but her tour starts then so I doubt she will.