Rihanna is most streamed female artist of 2015...

Rihanna scores one billion streams on Spotify with no album since 2012. Ultimately, this makes her this year’s most streamed female artist.
She is the most streamed female artist globally for a third year in a row, with not just one billion streams. Add 57 million listeners to the count too. Throughout the year, she's dropped three singles - 'Fourfiveseconds (ft. Kanye West & Paul McCartney),' 'Bitch Better Have My Money,' and 'American Oxygen.' That's really not bad for a "flop" era yet to begin.