Spotify (06/16):

Blackout – 653,306
In the Zone – 604,322
Circus – 580,670
...Baby One More Time – 476,235
Oops!...I Did It Again – 465,743
Femme Fatale – 294,878
Britney – 203,640
Britney Jean – 141,963
Glory – 114,476

— Britney Daily Streams (@britneyonstream) June 17, 2021