Spotify (06/17):

Blackout – 658,405
In the Zone – 617,780
Circus – 588,525
...Baby One More Time – 482,101
Oops!...I Did It Again – 473,932
Femme Fatale – 295,782
Britney – 205,486
Britney Jean – 141,523
Glory – 116,035

— Britney Daily Streams (@britneyonstream) June 18, 2021