>>32529988she's getting lower lows and highers highs (the highs being when she releases a new song), probably related to the fact that most people who are potentially interested in her already know about her stuff, so they watch the premiere as soon as it releases instead of discovering it mid month
the second graph is just the derivative of a logarithmic growth, witch is natural for any creator after they bloom (or, in case of starting with an initial audience, after they debut)
this is, of course, but an educated guess
(aka I made it up) 
